Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc7a49869144ecd…

MALICIOUS

PDF

76.5 KB Created: 2021-03-08 03:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58ab01e3d90d88ea068e3d9508cadd5 SHA-1: 11208b83147f72a43f0478fc74d8002d7708aaef SHA-256: ddc7a49869144ecdd16ecc9a217d85db07118aa7d2fbd9193f03d6944e022374
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to multiple PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious sites.

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://xezojetit.ru/aws?utm_term=social+construction+of+crime+example
    • http://raifaisentgo.online/refezemenadalotz77dw.pdf
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/5999833.pdf
    • https://zitolibozix.weebly.com/uploads/1/3/4/0/134040523/7835262.pdf
    • https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/satekikamab.pdf
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/wakegolarup.pdf
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/jafuzikete.pdf
    • https://dilazewinu.weebly.com/uploads/1/3/0/9/130969594/gotidesuba_xoxilime_dapezo_ligiwak.pdf
    • http://cloudmarket.website/bow_wow_ciara_like_you_mp3_downloaducxu6.pdf
    • http://parhelifrl.space/tilardxj0a.pdf
    • https://nazorilorapumug.weebly.com/uploads/1/3/0/7/130776423/furatabuna_zumebupugujase_rogukexewo.pdf
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/5361352.pdf
    • http://abanca-electronica.com/woderowiderejeniez3uz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_0692c0f1597a4fadba9a030bde1814ec.pdf?index=true
    • https://s3.amazonaws.com/farokof/digestion_y_absorcion_de_carbohidratos_bioquimica.pdf
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_816edec50fe04cdca85d7007959b5bc1.pdf?index=true
    • https://s3.amazonaws.com/ruzumeb/gegar.pdf
    • http://wolawozel.epizy.com/carrycot_sheets_tesco.pdf
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_5f2a56ac12b4467e8ed3da39fe8af0a8.pdf?index=true
    • http://ritopagagibuxu.epizy.com/wipupir.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e482.bin
8aeacb52183ff3bf887227b48ecff92b0d615af1dab76c76073945154c0fa438		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 5332 bytes
font_01_sfnt_off0000f691.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF691 3720 bytes
font_02_sfnt_off000101f4.bin
5f9aac50a18817649649ab6e6f051a15f3c91781b07c5c7409b14dd86cae6e69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 10108 bytes

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