Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f88d6c37b7198e…

MALICIOUS

PDF

66.3 KB Created: 2020-12-24 19:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1efdccf6f45861e13eb47e02c23ea76f SHA-1: bc00565a1d64d87d47246d899faa2ad220efea43 SHA-256: d6f88d6c37b7198e815e8d5351ce38bf1f3f5252cb31e9cbec2c968a539e9a46
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to funnel users to malicious sites. The ClamAV detection further supports its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://cctraff.ru/strik?utm_term=forward+assault+remix+crazy+games In PDF document text
    • https://dikefurilixi.weebly.com/uploads/1/3/4/6/134684794/gujuz-pigosuro-gojogujekajoti.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/db079000aba5e26.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/bapozapipop-diwadem.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/ac62b324-5db5-46a0-8c38-e8d7c003bbbc/java_foundations_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/bubble_games_free_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/juxirukewaduxi.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/hearts_of_iron_3_beginner_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/82690838474.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/animal_ippadithan_tamil_movie_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e96b92-0ca6-4391-803b-69c8b8468c56/sopijofiwoginosumamesuto.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/2019_bmw_x3_drivers_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

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_off0000c5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BC 5528 bytes
SHA-256: 4fa08a3effb9c48ed24221d6213ca934e75d191ac808ddacfe14c08af4b95a50
font_01_sfnt_off0000d895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 10708 bytes
SHA-256: f50ec68d6f8fd8422b20a842debb1ae11de18efc34c6088b12d432a610553ec7

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