Malicious PDF — malware analysis report

Static analysis result for SHA-256 6896b2c2f0d2d4aa…

MALICIOUS

PDF

91.2 KB Created: 2021-07-26 15:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70ef171b09b96bb6063ca7218f932466 SHA-1: 49ede4d7571d872703ddaab9190d31fe5588e009 SHA-256: 6896b2c2f0d2d4aaa52f77c47a04d0804fb0a3cabffcf18a3fc463fc2ba96a9c
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ca23aa32ad5f148b32c1f2e79d725adc/14437979080.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9447e661077046fa5723d7899963c4e0/98297991234.pdf
    • http://gardenofsound.com/userfiles/files/fidewuragiso.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e28fb4661---91313908744.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/zaluwebir.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/7c0a95ddafdc966ef09ab7952cc4422f/fawotojexorokumizoj.pdf
    • http://dekoblickfang.de/userfiles/file/58858219617.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e32571f18---23597617168.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/2j24fb6a6qoggkhtomitrht1hc/1918080673.pdf
    • https://aslimitada.com/userfiles/file/71420080234.pdf
    • https://pediatricpotentialsnj.com/PP/PPpng/files/vogarexejizo.pdf
    • https://havanic.com/cache/fck_files/file/88961276528.pdf
    • http://escuelasfutbol8.com/docs/files/40339110880.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2de2718d6f---zifagagejixijifisolu.pdf
    • http://sushi-belovo.ru/files/74152565359.pdf
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/dejasela.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085910dc3f79---xikes.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f22a02a2ef5ce1b7b39546131188aa27/35558731515.pdf
    • http://wych123.com/upload/files/raletutaxavupu.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30e6196500---11513722125.pdf
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/34196109294.pdf
    • https://palcev.ru/userfiles/file/sewomubojipinevorifapoz.pdf
    • http://bilafafafa.com/shopadmin/upload/files/minexe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=employee+driving+licence+check+consent+form+template
    • 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_off0000ffd3.bin
6dfc2884c4576838339005913c2ebb9a7dba5b09123fe9afbf757f0f97f87f77
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 16768 bytes
font_01_sfnt_off00012b96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B96 16792 bytes
font_02_sfnt_off000143ad.bin
aa2fa059b1c04e3d43c1a1ec7e6ac7f8b7dd7729dd477e3a826d8b51ca035787
pdf-font-stream PDF embedded font (sfnt) at offset 0x143AD 11324 bytes