Malicious PDF — malware analysis report

Static analysis result for SHA-256 907ea9b168ba1784…

MALICIOUS

PDF

78.5 KB Created: 2021-01-06 11:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee757c88e3f09c72588780a9548cc0fd SHA-1: 6929c41173ed2ef5909d6587e2fe24e72af0d515 SHA-256: 907ea9b168ba1784a41b537752f7341279b5aae4ca53ddbc63ec1356ba846b0a
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of many links suggests an attempt to direct users to malicious sites for phishing or malware delivery.

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
  • 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 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.
  • 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/aws?utm_term=spatial+and+nonspatial+data+in+gis+pdf In PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/eggDzjh/nibunoxubesorubavop.pdfIn PDF document text
    • https://fuwidomanajano.weebly.com/uploads/1/3/0/8/130874101/6834630.pdfIn PDF document text
    • https://diwixovejawi.weebly.com/uploads/1/3/4/3/134316523/vabidemopovo_gasipazuj_fufasal_lowogebuv.pdfIn PDF document text
    • https://zinexosodolawiw.weebly.com/uploads/1/3/4/2/134235462/97936.pdfIn PDF document text
    • https://powagaminabori.weebly.com/uploads/1/3/0/9/130969211/mukezorubepit.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/evkuKig/best_teenage_mutant_ninja_turtle_shows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_5fd95b8a39888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5febfb9dd9d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fe8ea0525f43.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/haFhiXX/furniture_minecraft_apk_free_download.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/lusabifef/blue_jackets_manual_1st_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/65583554532.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_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 5216 bytes
SHA-256: 24481ebba971f068c607883654a6458f52235dfa184760a9e84453b2acf38466
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 11276 bytes
SHA-256: eb7fa0c27f8efdcd7d1ea57ff73d7ce5450e50dcfe71cdabc17d3cc9e49eae44

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