Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af45620849d8909…

MALICIOUS

PDF

75.5 KB Created: 2020-12-31 20:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cff84d2647c711f76d8d4fad76febae0 SHA-1: 16229176b743c30e3fe910cc06f5d7fc5ffc4fb0 SHA-256: 9af45620849d89095c4fe687afffd57a4bc0269f6fcc8eb7b7e3df171b6d5cb9
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by hosting a link farm designed to redirect users to potentially harmful content. The heuristic firings indicate it links to known malicious redirectors and is part of a larger SEO link farm strategy. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to distribute malware or phish for information, likely through a social engineering pretext related to software downloads.

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://ggtraff.ru/123?utm_term=age+of+pirates+2+city+of+abandoned+ships+free+download In PDF document text
    • https://cdn.sqhk.co/kinibemazoz/jheDKid/guwekezoribuzova.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/ieE3heU/gb_whatsapp_auto_reply_apk.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/remumup-keliwiridixev-duralepuk.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/g5yYsgi/ear_doctor_bay_ridge_brooklyn.pdfIn PDF document text
    • https://cdn.sqhk.co/diwomijo/r4mH6gc/maine_health_virgin_pulse_login.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/494459b60706c92.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/f49Wvji/vawatozegejirus.pdfIn PDF document text
    • https://taxepenobeg.weebly.com/uploads/1/3/4/3/134355702/sotonavemolurezupow.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/HlQiehd/rumble_stars_football_mod_apk_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/dazuxujepov/14429164945.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/suzata.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/kutebupofalinugixunad.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_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 5872 bytes
SHA-256: ca1872497ebe1583bd522781beaf3ebca84f101800d679c6b494434c58f741a9
font_01_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 12680 bytes
SHA-256: 0f5ecafd4babba5c96bca9345361f208025e52d5cb6bf7622a4eed6a8c9b9af6

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