Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4bdddcd24e2d42…

MALICIOUS

PDF

77.3 KB Created: 2020-12-02 20:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ced18ccf49fdfe055ce833f4b5c06768 SHA-1: ded03737f5bf0e19ab9306eec6a5422c42b0d24d SHA-256: 8c4bdddcd24e2d4286e386a97e571e6398eab40bf69399f6f67a6f9082bc506e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://traffking.ru/strik?utm_term=pocket+mortys+hack+apk PDF link annotation
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/6895d7f2.pdfIn PDF document text
    • https://miwilokak.weebly.com/uploads/1/3/4/3/134375457/robasinoz-zukonesos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f8fbf3f1cdde.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/xujadivid.pdfIn PDF document text
    • https://vijilipaguwojig.weebly.com/uploads/1/3/4/8/134872157/jilulokujazo.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/9a0659250452f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_5fad7efc8e5ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5fa41f558b84a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf74c173fb5383b67a6c0/1606285132646/liquor_filled_chocolate_bottles_target.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeff4f81c9a2a0c672a49/1606283252782/honda_gx340_11.0_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afb7e94-8a56-4341-9e32-a78355cb92a5/schwinn_ad2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263cf9f5-458b-4dea-bc74-0d6d148b9ae5/download_entire_google_photos_library.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc368199955c744b54b807d/t/5fc677a59ee0f32b8733b40b/1606842279213/joxivekapovuruwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD417 4940 bytes
SHA-256: 3260baff067af6c4f993c35c1e7de94e0dc7a6f17c284b965bf6ade53caa0f93
font_01_sfnt_off0000e4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DB 18032 bytes
SHA-256: 4f0fb13554d18d374005731bbf344daaef46271727856850efd3ee565b7a962d
font_02_sfnt_off0001181e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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