Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd934c0bc4696549…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 03:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e40084691cd118ab246e73bb6e1e929 SHA-1: 1c9f4fe7c724ce4e8913393d4161d51a42d4e24c SHA-256: fd934c0bc4696549f2e3397b05bfad501817ff64b2d36d247602a490e5d95511
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://resalured.ru/123?utm_term=eminem+lose+yourself+video+song PDF link annotation
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/netubenewalosofu.pdfIn PDF document text
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/jinagowolilokekafar.pdfIn PDF document text
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/nurememesaw-guxon.pdfIn PDF document text
    • https://lurugidapu.weebly.com/uploads/1/3/4/3/134315770/7031925.pdfIn PDF document text
    • http://ukranews.icu/jivoboppx1ol.pdfIn PDF document text
    • https://melajepanaxon.weebly.com/uploads/1/3/5/3/135398769/1254733.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/9690354.pdfIn PDF document text
    • http://natikolom.site/draw_a_person_test_4_year_old0kdhk.pdfIn PDF document text
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/0af910.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/9909448038.pdfIn PDF document text
    • http://cybety.xyz/sazapajugekefojasumet1f346.pdfIn PDF document text
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/6592213.pdfIn PDF document text
    • https://gazulaloruvuv.weebly.com/uploads/1/3/4/6/134693071/19e6b92fb396e88.pdfIn PDF document text
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/ed429d9ff.pdfIn PDF document text
    • https://vorusasu.weebly.com/uploads/1/3/2/7/132740845/rutujurulimik-makinifetoxepol.pdfIn PDF document text
    • http://instofficial.online/wolonasegupulijigiqcne0.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/dudixesujipimira.pdfIn PDF document text
    • http://hangookoil.ru/54909639379fk5vx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawerudarasikow.myartsonline.com/tumeverovelep.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/32057166478.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/45659403759.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_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 5136 bytes
SHA-256: 7417816c9ed71d548e93ff90dc26417905358504dd1f42b8b05fce219de203da
font_01_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 10824 bytes
SHA-256: 137d6bb095dce58f323f77dd53e83f90633e64a60883243a0e7ae9cf7324ead4

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