Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf18377aa23f996…

MALICIOUS

PDF

67.5 KB Created: 2021-01-09 13:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2abef8045a3de25ccecaf5fb6fd94312 SHA-1: 6a0ed81b648482067bb0056824d5c3ff303b70e9 SHA-256: fdf18377aa23f9964c3500eb3952d95a0234c98a1a211ae2138a7c64834840c0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm or redirection scheme designed to lead users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to search results.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?utm_term=how+to+find+iqr+of+cumulative+relative+frequency+graph PDF link annotation
    • https://cdn.sqhk.co/kupovite/jVjdJic/doxogomiw.pdfIn PDF document text
    • https://cdn.sqhk.co/diwidivu/jHrghja/mojuvemafagolepukif.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/VhcigsS/40143394606.pdfIn PDF document text
    • https://bepugodaz.weebly.com/uploads/1/3/4/2/134236138/7602026.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/sudabazuxewum_rudozubag_norajelomeli.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/18a09b33-68ba-49d0-ba82-d9d3b69c6b49/10656503007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566e66d7-4a13-4d88-9ba7-ef28eb1a61b6/10235897008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810e94e6-b7ad-46bf-8f85-87153c9def76/wapimasisiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac655c7-f627-4322-b0ea-ede2c4af7198/ikea_kura_bunk_bed_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/shutterfly_app_not_ing_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/timing_chain_tensioner_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b879c2f-862f-47b1-8646-2ba809a1e449/46445988544.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/ginuxukumejudisadiva.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_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 5732 bytes
SHA-256: aed3e4cfc87f27f755baa3a69198adb1ed31180ede7fe81804f41d0935ec4e25
font_01_sfnt_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 10464 bytes
SHA-256: 1c47ea33ccfcab3eae4e33eae85a3ca43dc49f84ba12708338d60b45458c3aee

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