Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e626e9652af9be1…

MALICIOUS

PDF

73.4 KB Created: 2021-07-09 13:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce97b9ecd4de53187ed3ad83f8ada21a SHA-1: c4a0aa552f60dae9a9244a772cb12a1abb283ef2 SHA-256: 9e626e9652af9be19b94ec5381efe90ee38f6efd33f5f8f93b9a48cbbe91224f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://baobianhkhang.com/upload/files/72370892666.pdf
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/33767126287.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16087c5403f306---67529430773.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0afc85c1---wugimuzepudapesaf.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/nq2ivcthprk756d0ngd18v0p33/15390852816.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/69c044bfd5ea2ef870c67566185da370/peretunazesiragasixofevuk.pdf
    • https://netwindowvn.com/uploads/userfiles/file/33988257201.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/c5ql3l583jhh81b0r6dhnqkms6/tetavizifigopakamiloker.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/94223800455dce56cfc9acf18a75ecdc/11383016343.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/65419770631.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/706d6603356f835dc4c74ea28686ba57/bokujiretano.pdf
    • http://catherine-massage.com/ckfinder/userfiles/files/jemixiwotifoziruxud.pdf
    • http://www.jindatunnel.com/up_files/file/tavejevemomub.pdf
    • https://doublehair.center/upload/ckfinder/files/93525673472.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ji6m6pa7psn9i9pqgivsjnor9n/mexoxabiped.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e0a7a39284148e543c033b755a990562/34805176344.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e79e3f83ac27407d619c27d3474429be/javedilisonewogowofa.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963b3fe4846---93173078114.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/givqcb1u9k0b95ks53e6jrb252/19172834919.pdf
    • https://poolpoint.be/uploads/file/35945529923.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076d3797048a---jofodepuzisuri.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16077965e896b6---2113790093.pdf
    • http://creativetechno.in/userfiles/file/72657304958.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=first+class+scout+badge+meaning
    • 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_off0000bf7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7D 16792 bytes
font_01_sfnt_off0000d78f.bin
52d4ff8fa3990f00b99ecd42ceb34e0652d5baa09ded461e65e0100ad1525fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD78F 15600 bytes
font_02_sfnt_off0000ff63.bin
4e49c5afaf1cc69432b015130700198e25a999adbfe7d4874ceee42ef9d246e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 10932 bytes