Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e51c2df4b22a899…

MALICIOUS

PDF

98.1 KB Created: 2021-04-07 19:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e896dd2bbdfcea120f2031aedc18b03 SHA-1: 72935a12c58056b9f35d59fbbcc9e4e8544fb075 SHA-256: 2e51c2df4b22a899137739debeb1735c8ac4f592850b9ebb91e3e9b926644662
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=jest+configure+coverage+report PDF link annotation
    • https://duvibebo.weebly.com/uploads/1/3/4/3/134375256/lafosunedibima.pdfIn PDF document text
    • http://reduslimitaly-official.site/kakuxadolelulotebuvivt4oze.pdfIn PDF document text
    • http://openplafond.xyz/xadixomatefinisilewujetuk7nr65.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://kindraretterath.com/kiviwuvesuvebo6y1lz.pdfIn PDF document text
    • http://supportcopyright.net/patologia_humanardb8v.pdfIn PDF document text
    • https://jabofewikan.weebly.com/uploads/1/3/1/4/131437477/denenep_derofifapox_fipid.pdfIn PDF document text
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/guwijurukofivej.pdfIn PDF document text
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/5577374.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/3488136.pdfIn PDF document text
    • http://prizinsta.online/10287232978s3kcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_425acbb997ce4746a47779fab1fe1060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/lemuroke.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/what_is_in_wendys_breakfast_baconator.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/real_gangster_crime_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/john_michael_talbot_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/98246970419.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/arris_dcx3510-m_troubleshooting.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_ba28bc9279794ea5bcd862c3d9606f5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/ninemikit.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/47189738601.pdfIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_c3598005afd24618a53139c275418c2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zizene/i_r_c_t_c_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/battleground_survival_apkpure.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_3b2eb596718a4e5c8fd5b87a2eb60dc0.pdf?index=trueIn 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_off00013f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F91 5200 bytes
SHA-256: d5430cd3348412b20d7f56205bf8b3e2a2a96e6b5fa3e0417800016f84d5c08e
font_01_sfnt_off00015166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15166 12132 bytes
SHA-256: a8ce1ec80b5073f24542c809ae68c36906447b0b9d628527f196f8191d133661

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