Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a226ea5f0362e32…

MALICIOUS

PDF

66.3 KB Created: 2021-01-22 09:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2ed0f833d88d3c50175194eb678849fc SHA-1: 6f78e3b1a2dce3c1f760171152a25bf7d8e9571d SHA-256: 8a226ea5f0362e32af8525c81a0f80c155fabb07c7d7312565346ed4ac227472
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL suggests a lure to download further malicious content. While no scripts were explicitly extracted, the presence of PDF-specific malicious indicators and numerous external URLs points to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://bologen.ru/123?utm_term=tomy+big+loader+instructions PDF link annotation
    • http://xagowawusik.66ghz.com/liret.pdfIn PDF document text
    • https://cdn.sqhk.co/wojeberupe/Gzjdbgh/54229960442.pdfIn PDF document text
    • https://site-1179689.mozfiles.com/files/1179689/49650971319.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/ifiaghe/21159963876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fee406f84c62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477183/normal_6002164caca34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5ff5096d3233b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5ffa94f9e81ed.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/a9gfja7/33724030143.pdfIn PDF document text
    • https://site-1177495.mozfiles.com/files/1177495/call_blocker_apk_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fd67d560101a.pdfIn PDF document text
    • http://gabubixaj.22web.org/coreldraw_portable_untuk_windows_10.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/score_match_mod_apk_1__80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5ffd06f1b7760.pdfIn PDF document text
    • https://site-1172648.mozfiles.com/files/1172648/46900311655.pdfIn PDF document text
    • https://site-1173288.mozfiles.com/files/1173288/zakewisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notaruk.rf.gd/open_or_closed_syllable_worksheets.pdfIn PDF document text
    • http://fakuzilezozo.epizy.com/complex_compound_and_simple_sentences_worksheets.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_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 5452 bytes
SHA-256: c49234491a3e89a02abc0baa2b87545f57b181776d513f1575a2dbb426590b80
font_01_sfnt_off0000d1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F7 12588 bytes
SHA-256: 76507c847c204ac4dc667c013d91d878957f5fc0aeac4bb43ee2f796847e12ce

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