Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2705451f95806d…

MALICIOUS

PDF

80.2 KB Created: 2021-05-07 06:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 75530e47dfad7351423f21f38dfbc697 SHA-1: 16c52f1364a83bac2b252c26beabe7d8b41274a6 SHA-256: 0a2705451f95806d3d90dcdc2e6a76694d8fb0515acfc64e549ce05b60eaa208
186 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 0.9994

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=epson+tx+320+workforce+320+printer+driver PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/ieFPSkn/music_ringtones_galaxy_free_download_naa_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/jXkigUC/2776778265.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/casio_hr_100tm_ink_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/pwhctif/piano_music_maker_apk.pdfIn PDF document text
    • https://vamugibamapiju.weebly.com/uploads/1/3/4/5/134588186/wageniduniz.pdfIn PDF document text
    • https://luvemolovod.weebly.com/uploads/1/3/4/3/134305721/xigajila-safugafaguseb.pdfIn PDF document text
    • https://dezekebewefe.weebly.com/uploads/1/3/4/7/134731304/4764977.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/3576764708.pdfIn PDF document text
    • https://sopodepewujo.weebly.com/uploads/1/3/4/3/134340903/d7f21c9.pdfIn PDF document text
    • https://paxepufa.weebly.com/uploads/1/3/4/6/134640660/wosokama_lexatux_nomugenekezuv_zurudeva.pdfIn PDF document text
    • https://cdn.sqhk.co/numevaju/qigifie/revefovogitopol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_df1e46e266d5448dbe713fa9ffc1eabc.pdf?index=trueIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_3ab3a8f167684093aa24edbd997c4e5d.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_976800637ad8457e948ea11acfcf30eb.pdf?index=trueIn PDF document text
    • http://kevebavan.epizy.com/lawasufin.pdfIn PDF document text
    • http://larisakexifa.epizy.com/ramen_heads_free.pdfIn PDF document text
    • http://wetedezowob.rf.gd/konokomutajes.pdfIn PDF document text
    • http://valapapiwusujeg.rf.gd/41371538072.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_00dcaa8479b44e808a1960efc5762e1c.pdf?index=trueIn PDF document text
    • https://a1104102-e7f7-498f-9db5-fd16eb5a1c84.filesusr.com/ugd/3f19aa_5c795351f31041099e1e6600f2594652.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e75c505-24bb-40ea-a6af-d3cab11eb730/google_ki_history_delete_karna.pdfIn PDF document text
    • http://vujurow.rf.gd/98614777086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbdbb7c-7b01-4d99-9bea-c6314ec29d34/batiruwusurer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 5584 bytes
SHA-256: e103c22e31761d11e1abab1a4f86610401d3e79a4476890922db7a762272d497
font_01_sfnt_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 10856 bytes
SHA-256: e90a104943feb33ad9e6fbe193d7c47933d1f7cfe67e4edaff4d6e1ebfcbff2e