Malicious PDF — malware analysis report

Static analysis result for SHA-256 731fe7cb3beff322…

MALICIOUS

PDF

83.3 KB Created: 2021-01-06 08:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c229ec47005b87ef10ea030b7fd14748 SHA-1: b2f75fe469d7093077fb3b61613acfbc92a2e455 SHA-256: 731fe7cb3beff3229bf57f9a9311fc89d930ed3d1fda8b0ca74f3f8a249ab32e
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/aws?utm_term=bonetown+android+mod+apk'. Additionally, a high-severity heuristic indicates a password-protected archive lure, suggesting the document is designed to trick users into downloading and decrypting a payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=bonetown+android+mod+apk In PDF document text
    • https://cdn.sqhk.co/biserodafed/PWJgdid/d_d_dragon_god_names.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/giadMOu/offline_business_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/idXszF8/traffic_run_free_online.pdfIn PDF document text
    • https://zobezuked.weebly.com/uploads/1/3/4/5/134502366/wavawexegolotis.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/DicBIib/fowokiroladumabeg.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/idjiBjd/12790033590.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/2abae5dd8.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/qhigdhf/35451963000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92280a8a-02b2-4ec7-9561-0d6988909c39/acrostic_poem_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fe88b3-8d81-4a1a-a398-8823c56e8bde/94656034646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa601836-a289-4197-9be5-c7e0a7d11815/rivalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc1b127-d766-4e60-90a6-a7dc41c2f85b/a_skeleton_key_to_finnegans_wake.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001128f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1128F 19176 bytes
SHA-256: 1911454b0c38f279b9ca6fd3d5b70a080000eade1434abb3f13ade36f6247813
font_00_sfnt_off0000cab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB3 4832 bytes
SHA-256: c1318f9398b8af4b45ab7f2a61572d4d1b724c3488372ff577800c4c16361619
font_01_sfnt_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 5100 bytes
SHA-256: 3d2fa0bfcd2b54012ae6a9bf7807582572260f6c7caa07b3db6c1452a3f27ea1
font_02_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 11024 bytes
SHA-256: b38b8656e6d74462d1d499286067558e4d2db61d268ed51055af462def929ddf
font_04_sfnt_off0001317c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317C 4384 bytes
SHA-256: f3ba1d1d2f0a81df92331f6657376eca2dedf063bea95b7890e3f4ba0495554d

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