Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7042ab19752716d…

MALICIOUS

PDF

69.9 KB Created: 2021-03-01 13:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bffc5dc5b2f1944705b6c4c34a22f07d SHA-1: 7076a4940df7f2c0a7b6920eaba4fb911c532325 SHA-256: b7042ab19752716d843178041dee361a4b22f9d391d0d88c7bd1e64684d6f87d
156 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into revealing sensitive recovery information. An external URI pointing to 'seumenha.ru' was also extracted, likely part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://seumenha.ru/strik?utm_term=uscg+medical+certificate+expiration PDF link annotation
    • http://insta-sale.site/manual_de_direito_administrativo_742q6s.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/diavLjg/10601010604.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/dZijiKZ/teddi_mellencamp_diet_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/noxawuge/jdAcghW/wiloboxivuzisogefezatit.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/fiibCm8/pocket_veto_ap_gov.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/telewo.pdfIn PDF document text
    • http://7gusevshop.space/1260674179xl3m8.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/ijbibic/bit_dungeon_3_apk_free_download.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/what_am_i_riddle_answers_5poolw.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/zizene/95467068264.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/bavozitapotilovaxadujoxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/cetoprofeno_injetavel_im_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/mindfulness_meditation_for_anxiety_guided.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_off0000d3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E5 5532 bytes
SHA-256: bccd96b17c9837e282fd7d9f0ecddd6b5ceab810285fffa981f6a12b8e95b352
font_01_sfnt_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 10588 bytes
SHA-256: 3edf48b4f76ecb0bdebbdcaa49238908e38015f92df3fc096bab12549911d9a9

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