Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb35c9d8d1a63a5d…

MALICIOUS

PDF

87.3 KB Created: 2021-03-01 21:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 34f21db81bee418a4c4a8648caf94f8f SHA-1: 700f8b7f525000c76eb2b72fc388dbdc5bf74bde SHA-256: bb35c9d8d1a63a5dd37a0e772f18da0d6a98fa413e37ce7e754cd3a6c8b7c7f8
116 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it may leverage JavaScript for malicious actions, such as redirecting to phishing sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nipisod.ru/award?keyword=macbeth+fate+vs+free+will+essay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425926/normal_6037d18e74f4c.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/bgchfbr/94539487270.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/RKx6YYR/sad_ringtone_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/2ChiQhc/lekobevu.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/oqlibYX/steel_and_flesh_old_mega_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447267/normal_600132585a012.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/hghcjqP/noob_clicker_scratch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_601272830bf48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_603bb60f4733a.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/gihH9ie/island_survival_minecraft_modpack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475376/normal_5fff59c44356d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494430/normal_602741853c23c.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/hvgergd/61452084077.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/gH5Ohjo/bafudigijesed.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/cheHvz0/renututaze.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/dIhaiiZ/astuces_de_grand_mere_pour_maigrir.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/bibejovixapis/cadastral_information_system_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/xiexiemaster_xiangqi_chinese_chess.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off00010245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 5368 bytes
SHA-256: 02a35756b951692ac3320460ed48a1443770a87e3fa24830ad986e27b8ef7a58
font_02_sfnt_off000114a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A2 3952 bytes
SHA-256: 72d53d6e686c6d1b6bad23b01aa4194076d1036e4eab036e25a602f83f5b03d6
font_03_sfnt_off000123c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C4 10476 bytes
SHA-256: 424122e11da733cf6e5c4d9901fbb627626ac153a2386d2f23888624ff42f3f0
font_04_sfnt_off0001478b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478B 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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