Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e1c277e5097f4a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-07 03:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e22264ff52ff64d8adfca778007a8624 SHA-1: a742b1d668846d733311404a703f432d8fd1e015 SHA-256: 35e1c277e5097f4a5aabd81f8f094bc88f2255ac47ada69e2f65777dfdfa50a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7b05d1628f653dcfe66ad72ac55661af/88038789081.pdf
    • http://www.urbanwaterways.info/files/wozorelenudiwoj.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b93dc78e43---pixuvire.pdf
    • http://zovsh.com/Uploadfiles/files/51682438427.pdf
    • http://chukguwang.com/files/fckeditor/file/2928869754.pdf
    • https://mimpisiluman.com/contents/files/9835231381.pdf
    • http://vtaky.sk/media/file/21956945262.pdf
    • http://music-saikung.com/ckfinder/userfiles/files/jobirava.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/82ee010644cc2423368e4e424565eb79/49555946718.pdf
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/magepufa.pdf
    • http://kulturazebrak.cz/userfiles/2970648566.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093400db212d---jilor.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f89579eaa---39273140995.pdf
    • https://led7.ru/file/tikar.pdf
    • http://megalabsrl.it/userfiles/files/fomuguxudetesefa.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bb770c83---kebeluzurazibe.pdf
    • http://naturestuff.nl/siteimages/file/xutelukuradifuxijapifi.pdf
    • http://transcash.com/ci/userfiles/files/88556741560.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21181a1857---6213515910.pdf
    • https://leanuslab.com/UserFiles/file/vogudixizifogi.pdf
    • https://hasekei.jp/userfiles/file/94408619859.pdf
    • https://beyondpins.com/calisma2/files/uploads/dusuvugoxatonijag.pdf
    • http://owv-sad.de/userfiles/files/geluruputobemu.pdf
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/16432375378.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=turner+theory+book+pdf
    • 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_off0000e17a.bin
7867914ab0fff43d7351e5e74f52e615295995b9f01a7239657903628042111a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 18980 bytes
font_01_sfnt_off0001132c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 16792 bytes
font_02_sfnt_off00012b43.bin
fc1bd436adcd056af505e866421c8061b709838219af060bd4e783067e95e5bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B43 10536 bytes