Malicious PDF — malware analysis report

Static analysis result for SHA-256 61183ade6b140aec…

MALICIOUS

PDF

62.2 KB Created: 2021-06-23 03:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d9507a03e1e5a0bb337e64fc175cb0c3 SHA-1: 769d3920e30768bade1a1dcf805cb38b431fe3a9 SHA-256: 61183ade6b140aec80be67b0b8fa1bb26ec16822060a6dca1a69330665f7e519
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'Honeywell ag6 manual', likely intended to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://coretry.ru/uplcv?utm_term=honeywell+ag6+manual PDF link annotation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/984n2sf52h03a8e4oanbv4fvrv/velezerawuzobeki.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/6511d16f6a3276f1a578b2f29d4a93f1/julatafumoku.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/be9b4f98dee870d0bffe2905e5fdeaa6/wigepakaxi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/97952746868.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0c78e17d---80294980674.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6321fbd9e9b094ea58c27fa2ef57c040/15224534611.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ihmdtgnmsh7s7cq2ifnrm2pk23/86240994143.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/0fbf672dd6e240f35f76e84f9243e5d6/77009115454.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b73539339af---deragugeke.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/baa8201a2883dd470d5ac496ba747145/89537817439.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dceda176b---japasemupaburapisap.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/d7s20ct6tcpgf1jhkkpvlhan3m/46856549877.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/regipoworomelad.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e55165924b---duvesetuko.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/gilemiledipiris.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/75372584049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70C 5040 bytes
SHA-256: a18c8bb62f9e8382308d0d582d7269e5498c0b2f8f876dbd8eea10343c6c460c
font_01_sfnt_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 10792 bytes
SHA-256: 58cdfcab95ae0bdb1e3f07b2750be9bf13691a90fc7bb106fc005402b4f2f5bf