Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d9b4b806da6bab…

MALICIOUS

PDF

76.9 KB Created: 2020-12-19 22:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c4daee81c958918a6be702423001f6a SHA-1: 75c4c741f1d5d7657ea9a95e48c265ba5d56f72e SHA-256: e2d9b4b806da6bab0b0cbc2b958fab541d29b02e966b8acfaf6d383acc1bc5df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm. It contains numerous external links, with a critical heuristic specifically flagging a mass external PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious or SEO-manipulated content, aligning with phishing or content-luring tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?utm_term=platform+movie+song+tha+tha+tha
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/1a7a2099d23f7.pdf
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/a138fd.pdf
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/7237958.pdf
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/8010ae115b.pdf
    • https://fowimuwejagun.weebly.com/uploads/1/3/4/5/134529075/f8df804d55b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jubiferekaka/desi_tobias_mobile_al.pdf
    • https://uploads.strikinglycdn.com/files/bbdcf9d6-8a37-4d32-bf88-c9bb870a47e6/dream_savior_gakuen.pdf
    • https://static1.squarespace.com/static/5fc7b95dbcf5f06bcb7aac7c/t/5fd6846dacac596b0cc0140f/1607894125150/16067961884.pdf
    • https://s3.amazonaws.com/bisiku/acpc_full_form_gujarat.pdf
    • https://static1.squarespace.com/static/5fc53be8ab79f442f245f56c/t/5fcd571a920f47545ba45a70/1607292699628/didier_drogba_phoenix_rising_goals.pdf
    • https://static1.squarespace.com/static/5fc2814bab79f442f233bc55/t/5fc4146ecb3e0f5771cf90ca/1606685809273/pokemon_go_hack_apk_download_with_joystick.pdf
    • https://s3.amazonaws.com/faluzotixupi/nodosijodokipuvodurabefor.pdf
    • https://s3.amazonaws.com/ganubifirigevi/lalifilewo.pdf
    • https://s3.amazonaws.com/wibadinavosunom/romib.pdf
    • https://s3.amazonaws.com/muxozuvalubi/44074966508.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_off0000ef29.bin
6d49aec8c1ed9de420e919514a927630a229540eec6cc31b28511fc517820f7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF29 5240 bytes
font_01_sfnt_off000100db.bin
a24edb2320c9b29cc92f2d1a68ec7464401dec2bbd06f0689aa465bca16b3769
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 11168 bytes