PDF malware analysis — malicious · 3cde98a17b25fc6e

MALICIOUS

PDF

80.3 KB Created: 2021-07-23 21:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 72a6039670e8332226f80d873d343a8c SHA-1: 9fae39d2c2eeeff003ae3e2f4d7a2453c8a024df SHA-256: 3cde98a17b25fc6e20bd3ce731c0826090f20cb4faf8ffbbb62b6fd927101eab

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to WordPress sites with file upload plugins, suggesting a link farm or redirection mechanism. The presence of these links and the PDF structure strongly suggest it's used as a lure, likely for phishing or to distribute further malware, aligning with the Spearphishing Attachment technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/he3qt212rv45gn9u3afk1unep4/sasalododedudila.pdf In PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/f29f94497a2b7d95a3c5fdde3f16079a/sagezutopasavegebigojon.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/290f474acd140d653e9ec717b28c073b/fapowefakagore.pdfIn PDF document text
- http://hc6999.com/userfiles/files/sadilafisu.pdfIn PDF document text
- http://douzonebnf.com/upload/file///nuvegelumajamasoduka.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbdc72df3d---61391555931.pdfIn PDF document text
- http://shinies.ru/img/lib/file/kenejamorisewipol.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fcd97f1e2---fumoxezogazu.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5154e64c6---54156792749.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/gefom.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/252ad267461dcd1046fde440bce91471/dujewiwi.pdfIn PDF document text
- http://kaupa.cz/userfiles/file/66954448566.pdfIn PDF document text
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/8ade282a028b01a90ffc19190d6e0a66/68841999625.pdfIn PDF document text
- http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e2fa711f6---lajunamavaruxoguwaf.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/juzemoko.pdfIn PDF document text
- https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/9320baf4771cebe718132c14bafe5796/vilugafubuf.pdfIn PDF document text
- http://mazurubezpieczenia.pl/zdjecia/fck/file/tukasekijukolame.pdfIn PDF document text
- https://betalinktech.com/blmedia/file/refaf.pdfIn PDF document text
- https://kingyao.com/uploadfiles/files/20210716_154607_2211.pdfIn PDF document text
- http://www.cenlaenvironmental.com/siteuploads/editorimg/file/xegisemizuvemuruvi.pdfIn PDF document text
- https://tskrea.com/userfiles/file/koxudiwiziponumamak.pdfIn PDF document text
- http://obasekiestates.com/UserFiles/file/53510969831.pdfIn PDF document text
- https://bangprice.com/bangprice.com/beta/cms_image/file/92972054062.pdfIn PDF document text
- https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/abac12f59a2363b81ca87e38020f8019/satizemejimojiwefimi.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/2097bb367cfe65233d9ff2fe2f92162b/94929354970.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=exemple+de+punition+sur+le+respectPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d39e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD39E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ebb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBB5	10696 bytes
SHA-256: `90760c8d19b49ea4bd55f9fc993ccfef5b2a9ca944764b7fb72fd9a7e31ce282`
`font_02_sfnt_off0001042f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1042F	17780 bytes
SHA-256: `65d754afd6a74d7bd00c83600693b2401c0aacf4d0937f76f5a54b9843ba887c`

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