Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a010fad5a1ef11f…

MALICIOUS

PDF

72.5 KB Created: 2021-03-07 22:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cb1238d01be3d50d5c988804a39c4f89 SHA-1: 9a2775a01f837e4b934379a922be4fbbf25c6ca7 SHA-256: 9a010fad5a1ef11f251c366d5e7e539f59f52d29cac1f10b5b594f8956a93512
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains and subdomains, indicative of a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=piano+tiles+2+hack+apk+latest PDF link annotation
    • https://cdn.sqhk.co/biposuba/piKij5p/raft_survival_ocean_nomad_simulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/Dggnkt7/buvuxopog.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/kenetopifagar.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/zuhghjn/89250063698.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/is_porter_cable_a_good_brand_of_power_tools.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447447/normal_5fc7a9a71f98e.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/khgUig4/guwipekuxojokalam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fc5945174845.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/wuvur.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ijabjdQ/earn_to_die_2_hacked_unblocked_gamepunch.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/microsoft_onenote_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijedan.atwebpages.com/52322795206.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/dungeons_and_dragons_1_full_movie_in_hindi_download.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/63371209167.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/burovit.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/77699380790.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_7573848e44f54d118c196e0074356fae.pdf?index=trueIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_fcba7279c6164432941e81888f6aad33.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_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 5124 bytes
SHA-256: 08ee006ed89b23380671b6fbee59a56ea5523a4a32ad08d6362ec4e3ba2aebea
font_01_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 10176 bytes
SHA-256: cbc1acef7cbb750a35a899fda15d47b714ed63689108eaab470bc0dfe9906421

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