Malicious PDF — malware analysis report

Static analysis result for SHA-256 29daf5459f125676…

MALICIOUS

PDF

101.0 KB Created: 2021-02-22 14:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55be1e24b0f45c4e5f8d93be22edfcc1 SHA-1: 44618bcf4a555758d2d55486e3fb4c4bacbe7d0d SHA-256: 29daf5459f1256767ff6d4988f29d522f17375f85a521739225014dc9800b029
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wb?keyword=monster%20inc%20lizard%20sidekick In PDF document text
    • https://cdn.sqhk.co/kawinojos/bDjjOhi/kiki_s_vacation_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6022aa456150d.pdfIn PDF document text
    • http://muslims.net/the_farmhouse_kc_menuy3uev.pdfIn PDF document text
    • http://plafond.xyz/how_to_program_honeywell_outdoor_light_timerncuk5.pdfIn PDF document text
    • http://rubeatyshop.xyz/pudabizarurasaxofireko9zo1p.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/Vhmhaid/robot_gladiator_clash_hero_robot_fighting_games_unblocked.pdfIn PDF document text
    • https://faneboluti.weebly.com/uploads/1/3/4/4/134464249/xezetadatov.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/I4Zhhjj/lipavarexebasutapepoteku.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/hijUgiu/fallout_shelter_online_site.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_6011c5f4d60a1.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/6698087.pdfIn PDF document text
    • http://axecheat6.xyz/bijorijodv7zbn.pdfIn PDF document text
    • https://datezovog.weebly.com/uploads/1/3/0/7/130776229/905945.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/2301359.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/dgeWAhb/3140881426.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/mefonevimimix/papuvadu.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/36339395222.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/hypertension_icd_10_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/indian_express_tamil_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/34672406258.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 5052 bytes
SHA-256: f8bf4bfdfba2a882c91c8d6be8545e1b4ca8aebac5b76d2a77534c081171f3a8
font_01_sfnt_off0001282a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282A 9404 bytes
SHA-256: 0a83257457817bd6945629d7cc66eca9549872a94471ede415fa39bea2c88769
font_02_sfnt_off000145d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D8 12084 bytes
SHA-256: 65082c4a2c39c25d386b2d92636f458e7fb7546f99e6cfeccc1e9ba3c705da6c
font_03_sfnt_off00016dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DFA 16912 bytes
SHA-256: 7afbb646848cd5924be5db235ea8a406bf60a9592517f733d08a833eccbfed90

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