Malicious PDF — malware analysis report

Static analysis result for SHA-256 546d84afa91c1772…

MALICIOUS

PDF

103.2 KB Created: 2021-03-20 06:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b49cb5001ff8981ea4664ed789d5a782 SHA-1: c84284c6d9fe7739aa557c0963edf057ba723a0f SHA-256: 546d84afa91c1772463bd99032202adfdd0e8ec427f79c5a607ac2978697d3dc
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that mimics a search result for a 'Troy bilt tb200 parts manual', likely serving as a lure to a malicious site. The PDF structure also suggests a link farm, potentially for SEO manipulation or distributing further malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=troy+bilt+tb200+parts+manual PDF link annotation
    • https://cdn.sqhk.co/vomisape/i9ibv8Q/50593602829.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/coenzyme_q10_benefits.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/fufumuxadisatuj.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxogubajo/cjiLphi/evolution_of_species_2_mod_apk_unlimited_dna.pdfIn PDF document text
    • https://cdn.sqhk.co/lowixadoges/fjhjf6z/41814649203.pdfIn PDF document text
    • https://sujujawajiz.weebly.com/uploads/1/3/5/9/135964945/36e9c12e40.pdfIn PDF document text
    • http://bujenaro.scienceontheweb.net/sobaxapo.pdfIn PDF document text
    • https://dovekawelefirim.weebly.com/uploads/1/3/4/2/134266448/selavesex.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/ligole/blogspot_de_libros_para_descargar_en.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/counter_strike_game_for_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/autocad_certificate_online_free.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_1124c02b1c2048659eab464b95200f69.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_9a262b37c825448dae439bf6dad5a553.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_25552ead86fa4c7ca7432ab2bb3f5ac8.pdf?index=trueIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_4d625c6ba63242b39bfdb7a130621939.pdf?index=trueIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_c7f5b1066f0747f7a72ec020802c5a6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/90847554040.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/75048755373.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_off00014eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFF 5432 bytes
SHA-256: b6a69183b1e0e7a48c9dbe49c2487b98c122114bc3313df6a86a0aa6abffbddf
font_01_sfnt_off0001615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1615F 14260 bytes
SHA-256: bf44bbbcad90f4660d2f803c8244af3b8d2065567323b4c3c409ac0e78d19103

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