Malicious PDF — malware analysis report

Static analysis result for SHA-256 727c1322334ab27b…

MALICIOUS

PDF

77.4 KB Created: 2021-04-27 01:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 919d09d5bb62847cf23f9d10be592a86 SHA-1: 87269df8773700a518de8f470b19e3929a32aaf0 SHA-256: 727c1322334ab27b7d9da65281d2836204e57c786e27dc966d72f2fffe053afe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=netgear+n300+wifi+range+extender+%2528ex2700%2529+specs PDF link annotation
    • http://detonic-buy.website/54495313287pzry0.pdfIn PDF document text
    • http://fortuneo.biz/invisible_cities_author_calvino_la_times_crossword9z92o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_605be484021cc.pdfIn PDF document text
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/kobaluz.pdfIn PDF document text
    • http://bagadiwep.22web.org/librecad_review_2018.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/leatherface_1974_maskgu14c.pdfIn PDF document text
    • http://rufazezijew.22web.org/18289122227.pdfIn PDF document text
    • http://wigojomet.22web.org/17080416791.pdfIn PDF document text
    • http://jerazuxu.iblogger.org/tagemepawa.pdfIn PDF document text
    • https://jiviwakabukowe.weebly.com/uploads/1/3/4/0/134096071/fobuw_jofikuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5ff61348b91cd.pdfIn PDF document text
    • https://vavetupabon.weebly.com/uploads/1/3/3/9/133999816/67fcc804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rojuzejuleg.rf.gd/vawolazemoruwikin.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_49a13bf1698347c3b794f7f38fe34f48.pdf?index=trueIn PDF document text
    • http://vajitefafuxuz.epizy.com/narefirumotaxejovuxunugo.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/xezivowi.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_4f0c9fe61b934402a96946e9b02f5997.pdf?index=trueIn PDF document text
    • http://zorubanalu.epizy.com/que_significa_fecha_de_corte_en_las_tarjetas_de_credito.pdfIn PDF document text
    • http://dipodowimovaxi.epizy.com/snow_white_brothers_grimm.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_836c8b91cef747c7b2bd1a134080cf71.pdf?index=trueIn 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_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 6092 bytes
SHA-256: 848c8fd4d3eded313578ebb78b68e50ceb657ad66aeb197babc239144c7a23ea
font_01_sfnt_off0001025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 11112 bytes
SHA-256: 88409c623408190febf885117ea36de4bc52a955acce721cce76b7f22c797cd7

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