Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e474a69c868da4…

MALICIOUS

PDF

77.8 KB Created: 2021-03-11 09:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5c6a0ace2b9ab66efdc5e77744ac3ce9 SHA-1: b048c4157b67040813333dd36ad9b9366bfc8976 SHA-256: 32e474a69c868da458b08ccc94f23416b94b56a396f806b8504c1bd3b849a9de
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a "mass external PDF link farm" with 30 links. The primary external URI, https://seumenha.ru/award?keyword=cadenas+alimenticias+y+redes+troficas+pdf, is likely a lure to a malicious site. ClamAV also detected this as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://seumenha.ru/award?keyword=cadenas+alimenticias+y+redes+troficas+pdf PDF link annotation
    • http://xesesevatep.22web.org/20911742963.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/badukemowibu.pdfIn PDF document text
    • http://vetodegaro.22web.org/54682100865.pdfIn PDF document text
    • http://mugatazujiririv.iblogger.org/marine_steam_boilers.pdfIn PDF document text
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/titula.pdfIn PDF document text
    • http://veletekuti.66ghz.com/market_researcher_job_description_template.pdfIn PDF document text
    • http://zuwixegugul.22web.org/zuvijisurasakuradojine.pdfIn PDF document text
    • https://nogulakotu.weebly.com/uploads/1/3/0/9/130969216/vokisudinike-fawefemimitizu-zapaberuza.pdfIn PDF document text
    • https://boferisavupase.weebly.com/uploads/1/3/1/3/131384298/bonuxazu.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/nabifovu/introducing_spring_framework_a_primer.pdfIn PDF document text
    • http://xowatelowudok.rf.gd/regrouper_plusieurs_sur_mac.pdfIn PDF document text
    • http://puwagof.rf.gd/48716067371.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/independence_day_celebration_in_school_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/99419212505.pdfIn PDF document text
    • http://xexelakufakeze.epizy.com/7597028373.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/gawawekosowa.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/que_significa_cuando_sueas_que_tu_mama_se_muere.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/full_form_of_etc_and_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/infographic_ppt_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/26971729191.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/zukula.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/mitojugukutunezubasopuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/christmas_carol_movie_2009_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/91500291320.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/64452966343.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/diginemigavagevorulem.pdfIn PDF document text
    • http://jonogib.epizy.com/66889624471.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_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 5308 bytes
SHA-256: ca15df42128a1cb036976ec13b36179598ff13ad1f2e31465a61db277bf10d95
font_01_sfnt_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 11624 bytes
SHA-256: 2660259167b4af7378b5b54cac0f7852e1d410b3c24cf1c02ef2adfeffd6a1c8

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