Malicious PDF — malware analysis report

Static analysis result for SHA-256 1496299fe0ae1288…

MALICIOUS

PDF

82.7 KB Created: 2021-07-26 20:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9e80fbc0e61a1332e9374d119d6bcd09 SHA-1: d2372e7f7f6217735183397ecc41bbbd55bc4949 SHA-256: 1496299fe0ae1288286c96efc59819a955f48390337b50aab117f369b2075071
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 WordPress upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://abofahed.com/userfiles/file/kakuw.pdf In PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/50508785351624815282.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608011ae594c4---zifibumunu.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210613131536.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c2547ff83---11250117659.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ae614755c---sukekurakamemegirubip.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/pazajesuledekitegogedilo.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/0p0m3padcbdf0hcn5522dvfiol/popaladosaxa.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/tupizumedibapajajigu.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/koriborinirar.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/24169729271.pdfIn PDF document text
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/rumidenapijowexipazowe.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/xotanupijobar.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/badipediz.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/gatumapijo.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/dapivotudufomutol.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/regenilaxazadesufevu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/41ec44cfed27bf42dccc5fc1a4b2b6d5/duwowivapudid.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ae03934b4d92cced619e32472482c741/12513165194.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/11728965592.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b7f2cf5962ca660edb46e489742fd1f2/20483868760.pdfIn PDF document text
    • https://fratellifurloni.it/file/15258674830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+apply+binary+logistic+regression+in+spssPDF 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_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 16860 bytes
SHA-256: 529c70f2431b4d0db50b10165b6d69246832fec814772740d2944a42dc54ad02
font_01_sfnt_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 10880 bytes
SHA-256: b09c73b5da2f80223bd0c88a4fead7a2b7af2606a4ff1b6ec161868f09bef0d9
font_02_sfnt_off000123e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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