Malicious PDF — malware analysis report

Static analysis result for SHA-256 086db06ae8412dfe…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 21:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04a2ad3e49f0e7621ff3d29b9444afb9 SHA-1: fffad035906175c1bf2dac60d1cba278bf157a72 SHA-256: 086db06ae8412dfea46fed9129ce83bd933d3017bf47cc5a3348d45f12dffacf
156 Risk Score

Malware Insights

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

The PDF document contains a link farm directing users to multiple websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristics and URLs point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/50095f6156437f6d24c37175d686cf52/80600135058.pdf In PDF document text
    • http://lltsg.com/uploadfile/file///2021080413580370.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/dumagusonipep.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/dazagumokovifowapedobeweg.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/afa8528ee09fdd0d1fdaee1f4d4e1911/rofavaxanebi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609329dd883eb---wadovedufuxip.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/zurekifobafo.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/48877165432.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610334e7b3e75---85972448736.pdfIn PDF document text
    • http://zae.me/datafiles/file/bofenov.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/lamuturada.pdfIn PDF document text
    • https://adium.ru/userfiles/file/zipegofifetakediziditit.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/piburufedovuvuvonafezap.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ae19c8126a23c16e1b9e8af3695e8b59/sasakanodosawatibe.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/3941a3b9bf25930685fc641d3b853c6e/5689788679.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc13a4d835b---femepagepuferedaseb.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/49971559594.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/3019232374.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/adba8119d48e9ac54505e758172e6f3d/xakusokanenaluboxaxoma.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210713_042610.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcb5daf46b---60906437389.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f09a8e4a5---90307065428.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611ee1ca6b745---kijukusageputog.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a3ddf1dcebc5dd67445a08bbfcbc5db2/72659428446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=harman+kardon+go+play+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2B 21200 bytes
SHA-256: 41a3862af23e45bbba474255da137599ecae5a7300a2f45a8b9d5c4aa4374e13
font_01_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 10540 bytes
SHA-256: a43f8190b421cbe8185f04e56a0901c5f95974a0a3eda753487bf587c945644a
font_02_sfnt_off00012cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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