Malicious PDF — malware analysis report

Static analysis result for SHA-256 c601e0e42bab6a4f…

MALICIOUS

PDF

88.3 KB Created: 2021-06-27 13:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 584c1df4d80180500689de42c05ddf8f SHA-1: de28e18dc23c245b8b971abf0c2e9a5ed4fab4b3 SHA-256: c601e0e42bab6a4f00ec7416725d883512b4b19588e3ed6c1a6f59b69572ae68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple compromised WordPress sites and other unknown hosts, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to download further payloads or submit sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/83a85faa520c4473f0b34851e501e47b/mumumivufalajaluledoxe.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cb9e62720---memoxobelakediwusej.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/s9138sqjdam910pj69g8rl9pi0/rikuwuvazukifiz.pdf
    • http://dahchen.tw/userfiles/files/50012739958.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/a444877490b5ae1726c300a76d24b662/movosoviwowetatate.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3032cb516---43399851035.pdf
    • http://animalscipublisher.com/files/upfiles/file/jafuxevi.pdf
    • http://ats-dz.com/userfiles/file/84078094090.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/37ppd2t691rjd95udped0lit17/43732491652.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/3dc1542983155c30dc9e8ec07f659c49/xefowizipok.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/86f71cd65e447f46ffa3213c8befcb44/sutejanotizitivipopavigu.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc247b7d51c---49826781870.pdf
    • https://bravo-hk.com/userfiles/file/foxinilova.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160854f908f3ab---nafenerevukujuket.pdf
    • https://actorconseil.com/files/file/balonag.pdf
    • http://brianhaymore.com/images/e/file/zinogo.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac5ea12240---27750336464.pdf
    • http://lycee-elm.org/userfiles/file/vewawozewowen.pdf
    • http://shqinze.net/admin/upimg/file///fagoxa.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/6slhob8hhike8rjjhivf1fb1kt/wovuzugotuwenuxedev.pdf
    • https://haltia.mx/sii/ckfinder/userfiles/files/dasubemigide.pdf
    • https://accuratesearch.com/userfiles/file/xiral.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/d5589f5177c11f9bf317977cb61c021c/91084499838.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec37310e43---28048556902.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=comm+property+of+multiplication
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e203.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE203 16792 bytes
font_01_sfnt_off0000fa1a.bin
51f91d17fc6f2b210d902496d6dd0d0bfcb74e3cd6d0b70daeabe1d063745d80
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10716 bytes
font_02_sfnt_off000112b0.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B0 16088 bytes
font_03_sfnt_off000127e1.bin
44fe638b143f99632d47145c8ca95fbafc71c3d35b556b271aebd180cb76cc76
pdf-font-stream PDF embedded font (sfnt) at offset 0x127E1 16636 bytes