Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f7e768f71ef2f5…

MALICIOUS

PDF

86.3 KB Created: 2021-03-19 21:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4fa1552882b20e4f616a82fbc0f7817f SHA-1: a923fc6b4c18922614cd05165cb435aba99935f8 SHA-256: b9f7e768f71ef2f5bdbabbe2af422ccf3263000ea998fc265c674fc3a8dcf600
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of numerous external URIs and a link farm on disposable hosting strongly indicates a malicious intent to distribute further payloads or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/award?keyword=valores+civicos+pdf PDF link annotation
    • http://busforpay.online/61086202791hregq.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/kicMjg3/94262388819.pdfIn PDF document text
    • https://duwelivupegated.weebly.com/uploads/1/3/4/7/134711348/0a1832d72df9f70.pdfIn PDF document text
    • https://cdn.sqhk.co/panufarubel/phhhbhe/lol_wild_rift_2020_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/kosaboze/ihhhfje/cable_tray_size_selection_guide.pdfIn PDF document text
    • http://urro-hu.com/luvefel7mymi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5fc5d1785f9d7.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/jhidAx8/adpro_xoa_software.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/xjcRhdP/30752353142.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/jhf7djd/15255766919.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/Kig1chj/zawoduf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5fe8ed092fc1b.pdfIn PDF document text
    • http://meetsoda.club/oracle_12c_end_of_lifek6gz1.pdfIn PDF document text
    • https://revawowi.weebly.com/uploads/1/3/5/3/135317167/5950126.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/teguneji-jixemazusag-favuduzuvib.pdfIn PDF document text
    • http://uose.xyz/how_to_get_all_shells_links_awakeningjclaw.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/why_does_my_carbon_monoxide_detector_keep_beeping_in_my_rvdl34o.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/niidggk/flyer_templates_pages.pdfIn PDF document text
    • https://jitedutakawu.weebly.com/uploads/1/3/4/7/134712839/9bf10cb1d01978.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/5dbeaea69c4f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_d557da1190394f00b280b51d7f5355f7.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_9dadcd19eb67431c9db62e31cb1f3919.pdf?index=trueIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_5dda646002e04db0b5c6b02e755e911b.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_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 5172 bytes
SHA-256: bc42e002cb7803e87a09c2dcfff2135e867e564f7abb70c4c03a5fa2a108f65a
font_01_sfnt_off00012871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12871 10520 bytes
SHA-256: 52cf51a19e0870d3825708eedf8e0805e4b0660ce6dd57d998d6b176b34f0605