Malicious PDF — malware analysis report

Static analysis result for SHA-256 949b8d19b8ae03bb…

MALICIOUS

PDF

112.6 KB Created: 2020-11-25 05:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b467a29eec98259851d6d1f5061be59e SHA-1: bd55b0c0184c1f94953c76a332a1c43bc660dfcb SHA-256: 949b8d19b8ae03bb428c314fb5c5e4380346ea57945e6c2bbd2e1258c76b263a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL leads to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=decisional+balance+worksheet In 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/1da0a01c-19e0-43f1-a404-498df96d337b/rekindle_the_flames_quest_destiny_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99495a51-dbe3-4a73-a255-4b913bb15dbc/care_bears_oopsy_does_it_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebe8711-0d18-4226-9be7-820a85ff5598/nufesaruwosigolote.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/katy_evans_tuebl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748b652f-f1d4-4251-b7b4-1290df065993/darkness_before_dawn_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28eb6179-09dc-40da-8620-28ec76312817/giwagafelisokaruvexuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/35370515878.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/wutidufamunizebebiledifaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef43228-e63f-4c0a-96c2-77afab730863/viturewox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a27b79-0984-4757-af91-f46551133fd0/76764655087.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/aceptacin_incondicional_carl_rogers.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/linux_mint_upgrade_command_line.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_off00016335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16335 3120 bytes
SHA-256: 016562535695261fa949c20e037b245f776ea9462a3ec0c9e1c8d7b66b64eb05
font_01_sfnt_off00016e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E68 5180 bytes
SHA-256: 5258390e3ef74a25108091e7ecefa4d63bbd89307aae6667325817548c6bc7f3
font_02_sfnt_off00018019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18019 18180 bytes
SHA-256: cb6e842733bf59a451aa539fa43d25a323ba2be46f0ab5756957f0a7c4ad35c2

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