Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d8192b179eab75…

MALICIOUS

PDF

59.4 KB Created: 2020-12-17 05:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 108cdc206bc185b55277b14f94e59639 SHA-1: 4b87a504f5b733a515733bc68041d10b725d10b2 SHA-256: 12d8192b179eab75289ae4026fd9ad2acdee986b5863947ab7f8b28c89fa4831
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link farm. The primary URL, 'https://gettraff.ru/strik?utm_term=wps+pin+apk+old+version', is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=wps+pin+apk+old+version In PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_5fcee03f08144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_5faa41c96eb72.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_5f99badb575a2.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/pakokamowine.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/1960889.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/xiwuvib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fa20a59c52d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4d3c5b8467722f1ed09d4/t/5fc88e8f217b3604eddfa9d7/1606979216687/kiki_s_delivery_service_english_cast_voice.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29f756609fd0ee79c7240/t/5fc9643aed280e32aa8194d1/1607033914648/tiles_near_merry_hill_nc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc548e0be9b69395127cc5d/t/5fcf33b424ae147ef3d8a9e3/1607414709064/71538443184.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52bd43dfdd95b60f0edc5/t/5fcac08c8afb5e74443388a7/1607123085491/toy_rescue_rope_puzzle_mod.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_off0000af28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF28 5092 bytes
SHA-256: 908ef2c91dfb19d844093800d18be58febe24fa582c845e337cef16653f8c8fd
font_01_sfnt_off0000c099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC099 9540 bytes
SHA-256: 4cc4311c9fa45c5c2b6a4a413a4aa5d86f7604933a6c49ec5ab471dacf131699

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