Malicious PDF — malware analysis report

Static analysis result for SHA-256 14340c30ee87346d…

MALICIOUS

PDF

71.6 KB Created: 2021-02-17 16:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2630d542e3bdaef3c75ab721cc43aad4 SHA-1: 51f407938018c207c73471e76c241fec43ab43b1 SHA-256: 14340c30ee87346da6b088f64c05be7fd8d0ca13647231282736316bea6bde60
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, potentially for SEO manipulation or to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=bobcat+leo+zero+turn+mower+parts
    • https://nuxowodevuj.weebly.com/uploads/1/3/4/6/134609076/9158463.pdf
    • https://cdn.sqhk.co/tofegejij/jjKheNh/74093267680.pdf
    • https://static.s123-cdn-static.com/uploads/4424692/normal_60033a3ba6fed.pdf
    • https://fojumujitugesi.weebly.com/uploads/1/3/4/6/134688065/6503605.pdf
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/30e0d8f7a2ea3f4.pdf
    • https://static.s123-cdn-static.com/uploads/4375076/normal_5ffa6ee1bdf04.pdf
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fc5a0ae8ee02.pdf
    • https://cdn.sqhk.co/dolafita/iigcJjg/14070250696.pdf
    • https://static.s123-cdn-static.com/uploads/4424632/normal_5fc7ea4c1bffb.pdf
    • https://jatufajikovuna.weebly.com/uploads/1/3/4/7/134719937/2296892.pdf
    • https://cdn.sqhk.co/xekejegixawo/9ho0ro8/the_banner_saga_2_characters.pdf
    • https://cdn.sqhk.co/sileluzorupo/jyVhcjj/pumowemusijulimoromelijun.pdf
    • https://lisomoduxu.weebly.com/uploads/1/3/1/3/131383329/karimumamedefir_jupixiwatoji_mipij.pdf
    • https://cdn.sqhk.co/savunowudob/jejdixW/miwafugabesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tapelu/fakifipiponowitupaj.pdf
    • https://s3.amazonaws.com/wazorixekunafob/37512818510.pdf
    • https://s3.amazonaws.com/bidurudilidujug/local_travel_guide_business_card.pdf
    • https://s3.amazonaws.com/memobofilenabon/tirubomakosuridavapejo.pdf
    • https://s3.amazonaws.com/kizugokofo/xafurasojulavaxa.pdf
    • https://s3.amazonaws.com/xupizewuxere/andi_mack_episode_guide_season_3.pdf
    • https://s3.amazonaws.com/luborinizu/89046675436.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da3f.bin
32665723766a6db71b67b74f7240135844ae34d1b6378dec28a5ca37c3a796bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 5412 bytes
font_01_sfnt_off0000eca5.bin
3805751fb278ea253d5fda09b8ec7225f2518eb68b3ee5a2ca78fc2b7ed0571c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 10652 bytes

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