Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd870b1a02ce60ea…

MALICIOUS

PDF

72.3 KB Created: 2021-06-03 09:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3a6f79722724caaf6a78700434c2c4af SHA-1: d8f426a87a3ec9f7af6befe3c9098d871cf599d3 SHA-256: fd870b1a02ce60ea166970462947b950fd796c8c38c5d3e9a2e6f75fcd1048ce
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or redirectors, suggesting an attempt to trick users into downloading malicious content, likely disguised as drivers. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/pbw?utm_term=lenovo+g50+touchpad+driver+windows+7 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4475216/normal_60b3d7df9d090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_601db6234413c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389582/normal_5ffe8abfbfb14.pdfIn PDF document text
    • https://dubigeta.weebly.com/uploads/1/3/5/3/135341625/mezudezowiwelokat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466366/normal_6061cd7500ea8.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/venazurizuwaf_vujoruvem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460251/normal_5ff19b4d524ad.pdfIn PDF document text
    • https://nixewoxeb.weebly.com/uploads/1/3/4/3/134354190/61b2817f4a.pdfIn PDF document text
    • https://lekinowi.weebly.com/uploads/1/3/4/4/134476644/zaxiwu.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4426810/normal_60b0ac7fd1cb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_60071fa7d18b5.pdfIn PDF document text
    • https://matebafezit.weebly.com/uploads/1/3/4/5/134592398/9585004.pdfIn PDF document text
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/rajapokawawokisa.pdfIn PDF document text
    • https://nikovazof.weebly.com/uploads/1/3/2/6/132682709/8115812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc8a382-ab6a-458f-b2e0-45ffc2076bc5/a_prayer_for_owen_meany_audiobook_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2216ade5-20f1-4f4c-b219-37c633e36db2/wovasufudakaviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4a26a1-1609-4570-b7b5-c74d7c1756c0/g_shock_5081_ga_100_price_in_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db80998c-d77a-467a-a661-ba3d9d66396e/donugedazarep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17b85b1-aba4-4d98-8dd4-37bca2d47841/formato_de_mantenimiento_preventivo_para_camiones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5159dc4-970b-4f36-a1ea-2045f123e9bc/zujifibodasajepap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdc307d-7916-4039-9128-022ec9846e60/83933173600.pdfIn 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_off0000dc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 5740 bytes
SHA-256: 5024c6db439a8514f0dbb0d01739165306e5232105ce2e3e0f4e8b4093d713d7
font_01_sfnt_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 10960 bytes
SHA-256: acf19c2fbb21dba9cd4672c197602f5a845265cb94f5d8e3009115c9e5a390ac