Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ece6db9b3a7dfdb…

MALICIOUS

PDF

74.3 KB Created: 2021-03-02 23:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dfa2571393f9eea4c59f4645c1bfa1a2 SHA-1: 4b3ca27c6fedd8bd4ddfcc1b2357cf47cf91f620 SHA-256: 3ece6db9b3a7dfdb88d6d40240dc8b5692a596a6c8797cb1212f30483042e6ab
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=how%20to%20cite%20the%20norton%20anthology%20of%20american%20literature%20shorter%209th%20edition PDF link annotation
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/4088193.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5ff687cbc3d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_6037e8620a877.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/sozimedatidebox-warinaveboz-mufudabop.pdfIn PDF document text
    • http://golosa-spasibo.ru/29953377643p0x9d.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/dijonupewijibanepigqulw.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/fe65337bb17.pdfIn PDF document text
    • http://nekretnine.site/cut_down_grass_crossword_cluemt06x.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/sojuravewi/10619642581.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/39875087903.pdfIn PDF document text
    • http://binuxusegewake.epizy.com/39207580077.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/22204404747.pdfIn PDF document text
    • http://tudigefogoxawu.rf.gd/noco_genius_10_10a_battery_charger__maintainer.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/aakasha_ganga_malayalam_song.pdfIn PDF document text
    • http://subepofusetafop.epizy.com/v_for_vendetta_graphic_novel_citation.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_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 5744 bytes
SHA-256: d71d6a42b2f71f9b0c4647ec7678d5376186d191d2900c798df175a585b2c1a3
font_01_sfnt_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 10652 bytes
SHA-256: 144c190efeecb419774c2c569512e4324fa8cb14843ff519119689a5af0b74f1