PDF malware analysis — malicious · 2fff557a7999dc4e

MALICIOUS

PDF

127.6 KB Created: 2021-08-04 23:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 858849179b1a6c4000e066da0d5627e3 SHA-1: 6e2027331b968b53c48bc47bb1844ac8d4542eb7 SHA-256: 2fff557a7999dc4e4622b9fe3a599d786dd2664938fac7c44dd00548809e22e4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the nature of the link farm and the PDF's structure are consistent with techniques used to deliver second-stage payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9760

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/9167f94bd76eeb4b8d3ec222b236fd8f/nipesoz.pdf In PDF document text
- https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/97583402995.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/83a621e26fbbc130115165cf3ec109e3/magosivit.pdfIn PDF document text
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/emaecbr7sfviglsnfucedhjvl8/55522293340.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607521df8fcef---vuvapapuwupim.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a92555f385---19736715108.pdfIn PDF document text
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/ef0a83a0f94b29068dd57f9157dded89/74429542264.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/15179905545.pdfIn PDF document text
- https://adlinefor.com/home/webagen/public_html/korn/data/file/mijatuletoluros.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609898226eb37---soduzunipekavubapedex.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jiv6mtltpglr4ifbrk3a911iva/7537486069.pdfIn PDF document text
- https://toolsatool.com/userfiles/files/bopinenetafi.pdfIn PDF document text
- https://lanna-flyingclub.com/ckfinder/userfiles/files/97745209686.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4e619b411---42542594975.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608de847e01b6---tasokovago.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf02447bc9e---49919004914.pdfIn PDF document text
- https://juvelyrikoscentras.lt/Files/file/98489831155.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d2d206168---38131806918.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc78981b49---pazaladezumudoroma.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e49832d92d---rinelenimujujafibes.pdfIn PDF document text
- http://vom-ragnaroek.de/uploads/file/regerubokuretugawane.pdfIn PDF document text
- https://bikeid.net/ckfinder/userfiles/files/20970072811.pdfIn PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075abffc6c5a---ralizeluduwotunufusul.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/wenenixupegolatewijowo.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea79a9c331---10159458886.pdfIn PDF document text
- http://emeat.ru/var/files/62175811586.pdfIn PDF document text
- https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/7aa401919f2bac53a163f63db786f599/zalutavujidirajodiravaza.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=square+d+9013fsg2+pressure+switch+manualPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001623b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1623B	2188 bytes
SHA-256: `a73d62b234b4064283c813d403384e047d8ae61db3073ea0fd52b3f74145ccad`
`font_01_sfnt_off00016bef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16BEF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00018401.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18401	21744 bytes
SHA-256: `35af2e94419dc4d2bebd0b261b43911265950b7bb457b8b95f4f01fee2a189fc`
`font_03_sfnt_off0001bc56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BC56	11988 bytes
SHA-256: `b79eee145063620cf2f6a16e0d7598fa22bf91fa80a7388d15f6c77ad916a3a4`
`font_04_sfnt_off0001d89d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D89D	16284 bytes
SHA-256: `4a13c67843c7b88441aa7d0ad3cfd33a52e300351a24b69f3944ec0f5457187b`

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