PDF malware analysis — malicious · 656f7ee43519cfa9

MALICIOUS

PDF

71.1 KB Created: 2021-09-05 23:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: b16932a909717051922d5ccbfe8be6d0 SHA-1: bafcb2e4ee30860fc641a6b59eb5e4540ab18e98 SHA-256: 656f7ee43519cfa998c7fc66cbd99cb159f9ba6560c7f3825b2dbe5ebf75dc87

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the PDF structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

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://chcial.ru/uplcv?utm_term=rosieres+range+cooker+manual PDF link annotation
- https://jjpremiers.com/files/lawuxifuzanusolimugagi.pdfIn PDF document text
- https://ctapigroup3.com/contents//files/kubitepekotebodudukalu.pdfIn PDF document text
- https://debcopharma.com/userfiles/file/jazuzadejiruvinuwijuvi.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/gg1d3umpj6s5l9i2esdt2tmn55/87390921439.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9603ec50b---21005603903.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f21ca41458---fotawaxatitidizolewujef.pdfIn PDF document text
- http://dejede.com/userfiles/file/11964864094.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf91e0773---resafaja.pdfIn PDF document text
- http://vuatoyen.com/uploads/userfiles/file/sopetuzirono.pdfIn PDF document text
- http://xn--80age2amlc.xn--80adxhks/pics/images/file/2394224731.pdfIn PDF document text
- https://rewaqousha.net/userfiles/files/82834072803.pdfIn PDF document text
- http://sz-nuoyi.com/Upload/file/2021081914130344206.pdfIn PDF document text
- http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tefapowuxobawuporuzegom.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/9pupng81kv3un85gbb2b7ms0v2/46055498772.pdfIn PDF document text
- http://phanmemerp.vn/attachment/files/28904667326.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/77eb937c453065f845d7bad266403c1f/79229023912.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb1eb84932---fubikop.pdfIn PDF document text
- http://sujitonweb.com/userfiles/files/48237384845.pdfIn PDF document text
- http://pytextiles.com/userfiles/file/wigixuvovozemawalubo.pdfIn PDF document text
- https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lsj8dueceh1udtv4lfb3458am4/20656276946.pdfIn PDF document text
- https://harkakotony.hu/UserFiles/file/36953144785.pdfIn PDF document text
- https://deltarealestate-eg.com/userfiles/file/fupade.pdfIn PDF document text
- http://toyotarent.kr/FileData/ckfinder/files/20210806_C45B56AB6B645D9E.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/00279e806ae09b913e7679ae2bddfd61/75038627137.pdfIn PDF document text
- http://yejida.com/userfiles/file/tiwemujezaz.pdfIn PDF document text
- https://xlspandoek.nl/userfiles/file/tuwaze.pdfIn PDF document text
- 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_off0000b5f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5F3	15744 bytes
SHA-256: `f0697c09d7d84c93da9af098583f56441a24a3f8d039870efa3bd11e2ac9a247`
`font_01_sfnt_off0000de1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE1C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f633.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF633	10712 bytes
SHA-256: `7a101c7568206c796ac0ec7c7d6e4d11f19d43e8d3ccea883b28591a3c2a608d`

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