Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af05b5fad595f91…

MALICIOUS

PDF

75.9 KB Created: 2021-02-22 18:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 96eb34117924bb4b15278d2cbac8f35c SHA-1: f162095cc79bb394a3b8cc70e35aa3d372748e8f SHA-256: 2af05b5fad595f9170fd848b708bd74cf32df132eb384fd04a975612f197ef2f
186 Risk Score

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, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam tactic to redirect users. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to drive traffic to malicious or deceptive websites.

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://bologen.ru/strik?utm_term=holmes+allergen+remover+air+purifier+mini-tower PDF link annotation
    • http://xaziligoto.22web.org/wenasoruxuxawix.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/5be9f3de.pdfIn PDF document text
    • https://jinobodusere.weebly.com/uploads/1/3/4/7/134722577/b6ed7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_6009f10585107.pdfIn PDF document text
    • https://detawokigar.weebly.com/uploads/1/3/1/4/131453745/e279b050e60e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_60283654d3084.pdfIn PDF document text
    • http://investmag.org/i_am_that_man_brooks_and_dunn_lyricsa6ptm.pdfIn PDF document text
    • http://catsism.com/81383123194joe16.pdfIn PDF document text
    • http://tesar-krd.ru/saint_seiya_awakening_mod_apk_unlimited_moneyvzk47.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/tamaxado-rumizelipetepo.pdfIn PDF document text
    • https://besukobar.weebly.com/uploads/1/3/1/0/131069863/taforegoneze.pdfIn PDF document text
    • https://dovidememalow.weebly.com/uploads/1/3/4/6/134601329/jilifexobepax_labewu.pdfIn PDF document text
    • http://20970907.net/disney_songs_guitar_tabs5614t.pdfIn PDF document text
    • https://xanalefude.weebly.com/uploads/1/3/1/4/131411596/2665396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5fe905e3b232e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_6004b39c9ed61.pdfIn PDF document text
    • https://kudarori.weebly.com/uploads/1/3/5/9/135960502/77dc4a11de0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudefikireneb.rf.gd/dofejebolulesaluxobotuvo.pdfIn PDF document text
    • http://sipariwemarisu.rf.gd/18105290618.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/context_clues_worksheets_multiple_choice_8th_grade.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_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 5364 bytes
SHA-256: 6d0dfaadaffd91a52a2ff0ef75cf767640ce754838fbdc1798c85450c16a7925
font_01_sfnt_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 10988 bytes
SHA-256: bda22ea2767bc8df0609e3096cafc9e01562a1857ffb475a1ebadd36e488c559

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