Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79db7fb148004b9…

MALICIOUS

PDF

63.2 KB Created: 2021-01-16 10:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b2aa276b818ffca10d409c40bcfc24ae SHA-1: f8881258fbd1040123fa75b6bd92adf38ce2bc63 SHA-256: b79db7fb148004b9afb3cc41a3c924effdf8af3e4b8d41c535c99b246004f36b
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 flagged as malicious by a ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier. It contains a large number of external links, many hosted on disposable domains like weebly.com, suggesting a link farm or phishing operation. One of the embedded URLs, https://trafficel.ru/aws?utm_term=weather+report+in+khajuria, is presented as a weather report, likely a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=weather+report+in+khajuria PDF link annotation
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/811c5bce137c.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/36040.pdfIn PDF document text
    • https://migusubab.weebly.com/uploads/1/3/4/8/134849844/d31924.pdfIn PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/siwuxavu_degonokuneloras_xiwowiliw_ganatenak.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/jawali_bajulolaxafo.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/vefumumefuvini.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/kosule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fcf19963fd83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5f9fa37072a88.pdfIn PDF document text
    • https://nunewefumeko.weebly.com/uploads/1/3/4/3/134307525/5224027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5fc0f1fd5bab1.pdfIn PDF document text
    • https://sajadarazaga.weebly.com/uploads/1/3/4/3/134340855/kuwikazu-galijo-pitefanipijesov-tevoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zetituri/the_world_s_easiest_game_play_online.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB07 4852 bytes
SHA-256: 209f671ba6fd91ff4525353b559a75f793ab79e3e07ea962d243f044d5658405
font_01_sfnt_off0000cb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB93 10452 bytes
SHA-256: 7ea9d947e1004f1d90f261702834bd2cda128723b553c5ea723428ee03982d6f

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