Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db1c52514a68629…

MALICIOUS

PDF

81.5 KB Created: 2021-04-03 11:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2e7d02944c79df08b26ae1b1ad1e13a3 SHA-1: 56c5581307757107127ed25f34a55203bf0a97f2 SHA-256: 3db1c52514a686294b27e95966dd6320db74db8653a3358f541dbbec03bf6fa9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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.
  • 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://xajibur.ru/wix?keyword=letscom+u8i+user+manual PDF link annotation
    • https://cdn.sqhk.co/donuvoduvedo/hjijWun/96542014980.pdfIn PDF document text
    • https://cdn.sqhk.co/varaxupumami/eQdq8hd/xizojimixalerusupaze.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/8ne6Zia/95854141200.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/dphgici/pokemon_let_s_go_pokeball_plus_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kokedipemi/ohadHsh/jojeruwokito.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/bufegivobov-majiluzu-pijapudag.pdfIn PDF document text
    • https://koduvorubosu.weebly.com/uploads/1/3/4/7/134719400/62e78f6.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/valumu.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/ghwhigf/63955342070.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/0jigiid/9729649486.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/whdhhcO/51238084274.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/yigLjfb/hidden_valley_road_book_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/xizubutagen/dgc046S/judge_judy_salary_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/jjiJgcI/takiwibaro.pdfIn PDF document text
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/3206180.pdfIn PDF document text
    • https://cdn.sqhk.co/gidewura/jhiczgc/domestic_violence_act_mauritius.pdfIn PDF document text
    • http://xojokare.iblogger.org/37133193095.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/da5a2jg/sonic_boom_wellness_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/oQpzig7/draw_me_close_to_you_chords_b_flat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab220a8c-952c-4826-af7f-34ffbf895e74/54381059644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84aa5026-505b-4904-93ce-5982d8a3716e/patozagekovulip.pdfIn PDF document text
    • http://mamuwudusaxu.epizy.com/84705706033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed867cd-bfa4-47d5-b0b1-76baca1eec17/niv_study_bible_zondervan.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_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 5080 bytes
SHA-256: 37e9520ef788e7b11b0b22bb4969222729ecf6e661a38ee856b33e80a67ff6bd
font_01_sfnt_off000112d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D2 11196 bytes
SHA-256: 404e8cbb07f9e97f17925c57cea6eabb43a5f4fffee22542d5d46a3017b08b00

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