Malicious PDF — malware analysis report

Static analysis result for SHA-256 095b97230307d730…

MALICIOUS

PDF

75.3 KB Created: 2020-11-20 14:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e127a7d4e0ddd8b563723836ed9ade0c SHA-1: 74d9d17938763af43ae707fa2fcac1675abe8430 SHA-256: 095b97230307d7302615f67c720ce09ec0ff2219564636dac18069949b55c976
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'job guide'. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links indicates a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/123?utm_term=final+fantasy+3+ds+job+guide
    • https://kiroteveve.weebly.com/uploads/1/3/4/3/134378898/7119273.pdf
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/dolunabijosim.pdf
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/8571096.pdf
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/vopakusuba_dagejolariz_wenogudiz_jejorilenur.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/midamepereduta_leluvakojewoj_pisamiwu.pdf
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5f982cbd45ffb.pdf
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/1122206.pdf
    • https://rirejanumaxix.weebly.com/uploads/1/3/4/6/134631236/vejutusewewi.pdf
    • https://cdn-cms.f-static.net/uploads/4465269/normal_5fab0878d804b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nuvukivaxiren/bser_copy_2019.pdf
    • https://s3.amazonaws.com/nalifij/koxexarazadifu.pdf
    • https://s3.amazonaws.com/bikikanafopavu/pdf_editor_free_filehippo.pdf
    • https://s3.amazonaws.com/dovulavavo/2020_floral_calendar_printable_free_2019.pdf
    • https://s3.amazonaws.com/kikunojulejuj/87094624975.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_off0000e810.bin
f275d0d2d929c235b35d0900f5b0598ec6f87dcdf772d9784c02e69ff5ba521c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE810 5416 bytes
font_01_sfnt_off0000faa6.bin
a896d051e6b38a18975e9afbe210c6f99be2a2b473aae29d9f70062f308d84c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 11136 bytes

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