Malicious PDF — malware analysis report

Static analysis result for SHA-256 75193e90b99ecb96…

MALICIOUS

PDF

83.7 KB Created: 2021-07-16 13:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eecde369d2baa69ecc57edfefe775b26 SHA-1: 827da563f826c2cced67c8130d45539781d09a72 SHA-256: 75193e90b99ecb964d6a9464d84dcbadc47a7786b10d6dcffc49be0397efb77b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/54728643164.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c20b5d3694---23256221990.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c35420e42e2---bazawifumelireji.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4feb827d32---vexajokumedulozoz.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160849fa9b5716---12090485280.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cccd6d3de7---73803350262.pdf
    • https://dolupin.com/calisma2/files/uploads/sajofuvilupeguzesomiw.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/512a1b91ceb6175e634ca75b2d9c97eb/43282182893.pdf
    • https://beautyreviveshop.com/newerac2c/userfiles/file/wupekokawinuvomemeriwu.pdf
    • https://al-farh-iq.com/upload/userfiles/file/23982457137.pdf
    • http://bociany.sk/media/file/wimodolufeziviwuti.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/alam1aenropkdi2fnmc83fvq0h/84257596880.pdf
    • http://billedbutikken.dk/articlefiles/file/94499969.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608508dc9ef78---vufixamedubosexefewaker.pdf
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/51139999334.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b862d7029d3---86053691180.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2c3684b477f9f072d0b0af3a5598a670/tigasigisorazaje.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/e5mvius07kbu0mpr1vh87fjf2k/59175663818.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a269bbe4c---69805304723.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f5b01f7444254e75e1f5e3a8c9e8c75b/nakekopigajilijoninelija.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094d9a239cef---10975578439.pdf
    • http://kunas.lt/app/webroot/uploads/files/19758213685.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=meaning+of+deplore
    • 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_off0000e346.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 16792 bytes
font_01_sfnt_off0000fb58.bin
401d259b6bc61d3d3db4f84cbd507e0db6c55f5a86367495515c9ed47fc2f623
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB58 18356 bytes
font_02_sfnt_off00012aaa.bin
f87b63d36016668248da110857700d62553d082cdc0a87e2080593ffe0a1565e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAA 10400 bytes