Malicious PDF — malware analysis report

Static analysis result for SHA-256 97486d8d1ba8a920…

MALICIOUS

PDF

66.2 KB Created: 2021-01-19 06:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f051ec1744fccc0124847903bcb621c2 SHA-1: def8fc39dd63378f0e2e308b60704ed1484a7fce SHA-256: 97486d8d1ba8a92069c167c383faa4bd7e0e25fd954ba8d2fc66f53c0917f104
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, including one pointing to 'https://crophysi.ru/123?utm_term=cambria+county+courthouse+phone+number', and a large number of generated SEO links, such as 'https://cdn.sqhk.co/gadewekunel/tiiwgiM/vidasexexegov.pdf'. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or further malware delivery.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=cambria+county+courthouse+phone+number
    • https://cdn.sqhk.co/gadewekunel/tiiwgiM/vidasexexegov.pdf
    • https://cdn.sqhk.co/fabozesemi/UIDhdij/vidavu.pdf
    • https://vutuwoti.weebly.com/uploads/1/3/4/7/134720014/a25c4f55.pdf
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/giridinenevetux-kobovebevijumo.pdf
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/faxusupopenubewov.pdf
    • https://cdn.sqhk.co/bejadelu/ieihia6/movie_tickets_gift_card_number.pdf
    • https://site-1179526.mozfiles.com/files/1179526/atmos_energy_bill_payment_address.pdf
    • https://site-1257493.mozfiles.com/files/1257493/50493785795.pdf
    • https://cdn.sqhk.co/polirorenu/dsR51jd/xusemo.pdf
    • https://site-1173706.mozfiles.com/files/1173706/zuwenar.pdf
    • https://gomejewenikugi.weebly.com/uploads/1/3/4/8/134869664/954df25.pdf
    • https://cdn.sqhk.co/xeposetuge/bKMnUgd/three_kingdoms_tv_series_watch_online.pdf
    • https://site-1171549.mozfiles.com/files/1171549/sniper_ghost_warrior_contracts_2020.pdf
    • https://cdn.sqhk.co/gotofebelu/OhajeQ6/samurai_jack_game_story.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kagilabitivibe.epizy.com/88750113213.pdf
    • http://pejezal.rf.gd/tababekojituvoxumobi.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_off0000c7a5.bin
700d24b6842eb30527ab1b76bb65dc312942987b3ab4ad66e556b706c215cb0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A5 5288 bytes
font_01_sfnt_off0000d973.bin
b763129dc74f0d1cbd9dd9d4e9de3d4c250aa5062bddffb35f87fa92ddcccb56
pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 9980 bytes