Malicious PDF — malware analysis report

Static analysis result for SHA-256 3339b456061fa222…

MALICIOUS

PDF

90.2 KB Created: 2021-03-28 00:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 10cec75f70114a8f4ba11979af2d2ef6 SHA-1: 22e6954265a1e7c4de58063bb4b10e5fb304c529 SHA-256: 3339b456061fa2229e0378e118b94f68cb2642108f8eb15bb3bc95b51b009453
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains references to '3d bedroom free' and a URL, suggesting a lure. The presence of numerous external URIs, many pointing to disposable hosting, further supports a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/123?utm_term=3d+bedroom+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490116/normal_604f0cac0f219.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/jajicA3/80570440000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415525/normal_601e0db3a3824.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/ieyDnKd/31261096974.pdfIn PDF document text
    • http://resapus.scienceontheweb.net/more_than_allegory.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/jaijUje/zombie_survival_state_3d_offline_zombie_targets.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/jfyfPjb/wemukajifaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_601dbfda9ce72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_60059450de917.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5ffc042193130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_602cf239381c6.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/9d203f96-352b-4983-b278-d7dc3a92e67d/temivukirukiwoza.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/46073402799.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/72717638945.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/beer_sensory_evaluation_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/wijebopot.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/dotejev.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/princeton_review_gre_books_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78665b2e-aeea-4d4b-943d-85545443d565/list_of_greek_gods_and_goddesses_and_their_powers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001256f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256F 4840 bytes
SHA-256: 6a9235acc29259d1cbd0193009742ea5af875c59717b935961019fdc7dba6eaa
font_01_sfnt_off000135d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D0 11072 bytes
SHA-256: 1ff4737760e6177dd7cdd834661182613f230c303f508145d76bc95df1c3d32f

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