Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edff12f46732c99…

MALICIOUS

PDF

76.6 KB Created: 2021-03-11 09:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 26e3b988adb851a7cdbb56df8aedd77a SHA-1: 25aeb312fe7502e997210a998c6ab093ece6e15c SHA-256: 0edff12f46732c99bf98d399c9ed21d81b9a815325a16ea856f06809f58f3d00
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting or potentially malicious domains, indicative of a link farm or phishing campaign. ClamAV and ML classifiers flagged the file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wix?keyword=height+weight+chart+female PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485163/normal_6002203962099.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/jegepufaw_xelobanoge_baxura_kobefedemixaje.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/giidjeA/mastercraft_maximum_flooring_nailer_review.pdfIn PDF document text
    • http://tomandbxof.site/dell_optiplex_3010_tower_i5-3470jatiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_5fdc2eb20d30c.pdfIn PDF document text
    • http://ogranicbio.space/felegujuf7ejdx.pdfIn PDF document text
    • https://majivuwuwu.weebly.com/uploads/1/3/2/6/132683475/910926.pdfIn PDF document text
    • https://sofofiwolasaxu.weebly.com/uploads/1/3/1/8/131856039/05425519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466680/normal_5ff4d366781e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453332/normal_5feb414dbe4d8.pdfIn PDF document text
    • http://azules.ru/rockstar_movie_hd_worldfree4uxsfva.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/tufewa.pdfIn PDF document text
    • http://xbet1.fun/lozixamokuzobosuvonizadowszgpe.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/lupozatavov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_600831237bcb8.pdfIn PDF document text
    • https://cdn.sqhk.co/gawarebadal/4jYfiij/harry_potter_bloody_hell_gif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_f62cd23232504d8f8f24baae1163d283.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_0a3153d4471c4573b64d9ac30968b696.pdf?index=trueIn PDF document text
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_90f5e23ecc7546c59d3afcd49f48150f.pdf?index=trueIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_af34c3270c4e4cc3af681566a8e9f5f4.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_13dcc43bad9c47238659d815e8d53ece.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_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 5168 bytes
SHA-256: 51c16dbef669a7f88fab657455a7d88e3f47212637cead8559fa53625af60816
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 10132 bytes
SHA-256: c9cacc99d4f360fd0547bc0179a0b4374098c243491318ad1f4bcb8823df1004