Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fe2db863994da3…

MALICIOUS

PDF

66.8 KB Created: 2021-04-05 20:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4395117a01d14059ef58524b80cc9ea1 SHA-1: 02b26646daff7574836d9778790823ee2993939c SHA-256: 92fe2db863994da36108eb7f279fb620bf21c3e620f209b78fdfafb524c95155
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common technique for SEO spam and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic PDF_SEO_LINK_FARM firing suggests the document is part of a link farm designed to drive traffic to malicious sites, such as http://getdouche.xyz/bepotokozokovinipaxesegfltw9.pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=honda+generator+eu2000i+parts+manual PDF link annotation
    • http://getdouche.xyz/bepotokozokovinipaxesegfltw9.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/zoparavozosotusinu.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/hNxdgg1/video_maker_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/GMjDlja/the_walking_dead_a_new_frontier_ps3.pdfIn PDF document text
    • http://electriccannoz.club/buvuziwabimtbiz.pdfIn PDF document text
    • http://lnstagramverifycentre.com/dosebisuupoum.pdfIn PDF document text
    • http://nikaold.site/bear_archery_cruzer_g2_draw_weight_adjustmentpg7cg.pdfIn PDF document text
    • http://pl50off.info/26995346441ktmp5.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/f238e41362bc1ab.pdfIn PDF document text
    • https://jupaxegusuwe.weebly.com/uploads/1/3/5/3/135389123/guxigixefukag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lomogas/2020_ford_mustang_shelby_gt500_price_in_sri_lanka.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/dubois_the_talented_tenth_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/65470319973.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/annual_report_jrpt_2012.pdfIn PDF document text
    • http://waboxizolomove.rf.gd/bloons_td_6_save_file.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/how_long_will_a_2011_chevy_traverse_last.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/bts_billboard_2019_full_performance.pdfIn PDF document text
    • http://dajivetu.rf.gd/bit._ly_nyone_app.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_off0000c7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 5516 bytes
SHA-256: f6d85ffc91c55de72b62d6c1070afa964c6f6a7bdc3230ee921e33e80dc50e52
font_01_sfnt_off0000da76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA76 10340 bytes
SHA-256: f104afbdf4660466664b4354091cfc39c806dff803b9b337e1bae97ffe0d1956

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