Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7c21dc02365dbf…

MALICIOUS

PDF

105.6 KB Created: 2021-07-10 08:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93d10f3f761336905dc4063ca54802a7 SHA-1: fbc02ac2630136c1d083327b59f0f6cdac532fbe SHA-256: 3c7c21dc02365dbf3abeaa534388ff0279ac0720bd62846d8ef34348d7da099f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 http://hitecds.com/userfiles/file/23950177627.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/459da05de75b8301c5982bfdb419b92c/87760219816.pdf
    • http://cornucopiafrederick.com/uploads/files/14023933583.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a709d3bdba5bd18fab5633aba8212ab8/toripelunefur.pdf
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/jitadabetepibobujapewinob.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9de0ef6d92e9a7717e26aed31412690d/folizikelegomatur.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/surobosazudumuxaroj.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6182a0620---22275196968.pdf
    • https://alakharia.com/public_html/userfiles/file/feredovolukutuvuxidif.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/4k3vgoh3tk36pp40qb972ea795/gikezojobi.pdf
    • https://pacpartner.net/images_client//imagesfile/pabufedixofodolovuwi.pdf
    • http://soflocops.net/clients/81266/File/17696496016.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dcce69547---69001241443.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076088142929---66695743671.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/36c03b3b9c557490ec82cd26e4cad3b2/gulivupazoviwolamiv.pdf
    • http://mistralizmiryonetim.com/uploads/file/biwukelajakumovegamevil.pdf
    • http://thunderstar.cn/userfiles/file/20210504111347946989699.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1104d7fe00---sasegodopefemi.pdf
    • http://jdhs77.com/clients/58520/File/resanefakesele.pdf
    • http://3asoft.vn/img/files/xuxesome.pdf
    • http://uticachemical.com/files/upload/files/84022213065.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096de00a616d---67323282564.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16083604c7b385---82434766462.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+4+beauties+of+china
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013caf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAF 16792 bytes
font_01_sfnt_off000154c6.bin
e081179962151e89b065c4f0877d727d96e4b6f9d704d8380f486c284bcd7b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x154C6 10568 bytes
font_02_sfnt_off00016ce8.bin
2ca8d9386420315744c9a2d33247301d926a50533caa151c615ed3c75cfaeec3
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CE8 17120 bytes