Malicious PDF — malware analysis report

Static analysis result for SHA-256 c745de360dfc3445…

MALICIOUS

PDF

73.7 KB Created: 2021-06-10 00:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c7c7967737626f3924661244a84d6a0f SHA-1: 50405609e4c6f13ea20292dfde24ae9370fa4a96 SHA-256: c745de360dfc34452b07a88f6a24e2fc27e3d8a38f1b14d4adcafb33752c6af7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, forming a link farm, with the primary URL being `https://allytemp.ru/pbw?utm_term=cocktail+full+movie+download+moviescounter`. The document's structure and numerous links suggest an attempt to redirect users to malicious content, likely for malware distribution or phishing.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://allytemp.ru/pbw?utm_term=cocktail+full+movie+download+moviescounter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422392/normal_6046640317069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_605c72a62575c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_605d89626d4f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5fda49ee61e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_60354dec155ca.pdfIn PDF document text
    • https://vegebawijinewer.weebly.com/uploads/1/3/2/7/132740558/7463183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477373/normal_6026f67511f42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365662/normal_5fe4eedc07ae0.pdfIn PDF document text
    • https://nozudasukexip.weebly.com/uploads/1/3/4/4/134441991/vuwafaxajek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450152/normal_5fe2a92695f33.pdfIn PDF document text
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/kavejarobakoz-kakemetimad-zabozuwozup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404290/normal_5ffb55e6db4ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_60638adea1664.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/d78b23e3-79e3-4445-8358-7126c3b4605d/do_tankless_gas_hot_water_heaters_have_a_pilot_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49194121-e4c4-4d6c-b02c-3420d5961aa4/22557048602.pdfIn PDF document text
    • http://wusajigi.pbworks.com/f/fufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a010c0d8-248d-4f20-9eab-7cefd9b82bb0/39462912143.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/w/file/fetch/144565503/befuvinugapafubom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a54d35-ec81-4d17-b7cf-9585456c3aa7/minecraft_free_online_version_-_minecraft_games_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e1b9df-92a7-41c7-8b52-a65ffefad67c/pewisezijowupebunad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889b049a-568d-4a30-9e42-0ec4b548acca/what_does_it_mean_when_a_maytag_washer_says_lf.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144466923/87756060026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8606efc-8f4f-46ee-9fdc-313649d42323/what_size_is_s9_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88b15f0-576e-4dd8-888d-0a70af8af16d/how_much_is_the_disability_pension_in_australia_2019.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_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 5288 bytes
SHA-256: 5acc1b10ce65b26d2ea9ad6bd034b79a1e1d4e503c01c41a60dee60d2c2ee472
font_01_sfnt_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 10340 bytes
SHA-256: a5d6ff60668ee52c0619076f9eedb142f6ca39574be2da0ea339b245ccb11f40

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