Malicious PDF — malware analysis report

Static analysis result for SHA-256 793322817b1a4e2b…

MALICIOUS

PDF

62.3 KB Created: 2020-11-30 05:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 07f866aadb963c8e63f60bfe3622579b SHA-1: d63f63aaa48f69410990bbca89750b05b3296398 SHA-256: 793322817b1a4e2b8736d1775c0c15e4ae3c1249771dff01ec053cfa39a7cb9a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://trafffi.ru/123?utm_term=smoke+dza+not+for+sale+zip PDF link annotation
    • https://sarixibaparuve.weebly.com/uploads/1/3/4/3/134382026/2229117.pdfIn PDF document text
    • https://luletifolavok.weebly.com/uploads/1/3/4/3/134369244/seloduxa-lifujarix-poxubo-jarivilu.pdfIn PDF document text
    • https://givexikiduxa.weebly.com/uploads/1/3/1/3/131398224/nivojo_dasesiginisowob.pdfIn PDF document text
    • https://wuzesitawe.weebly.com/uploads/1/3/4/7/134733123/gavebanurubegu_mivomuzuwa.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/gatazezizujebap.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/9458210.pdfIn PDF document text
    • https://gupamawuma.weebly.com/uploads/1/3/4/6/134602371/zemolimudegejog.pdfIn PDF document text
    • https://wajodaxomunav.weebly.com/uploads/1/3/4/6/134625674/8352712.pdfIn PDF document text
    • https://wusumojasojufe.weebly.com/uploads/1/3/4/3/134352244/tezanaluxiwetev.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/datarofapakil/17532427302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6f0644-8322-4488-ab6b-9e5b4a5c3dd3/pilofukogapitexepiwidenet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aecacf7-cd46-4b24-995b-3032dad96062/pebubeladujakavolig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c97b6b-edfc-4ca0-9909-cf8fda3f6b84/vibeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ba5148-2f50-462e-b093-ca268c1cf5e0/ppsspp_gold_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20055d82-e7c2-434c-9240-e11f9edd862b/echo_show_5_instruction_manual.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_off0000b586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB586 5404 bytes
SHA-256: 521cc43f742686bbcca64fae4db7c344fa8a2320be2803e972ce467586fb5ea3
font_01_sfnt_off0000c7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DD 10824 bytes
SHA-256: 379e711b45f568f93860528e3cd080d2a10d534a27c27a58f4fcf238ec91ea03

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