Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04aa65b90eb2a51…

MALICIOUS

PDF

78.0 KB Created: 2021-03-10 21:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: cbdbdf0c5d8a3d33bc4a76a73bea31e6 SHA-1: aee2c6d525fe169907afbf2c52298a31e9a6a08e SHA-256: f04aa65b90eb2a511904c37207b585bff5b58590795e2a7642a1475af41e160a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to French words, likely a pretext for a phishing or scam operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://lozipotod.ru/wb?keyword=list%20of%20french%20words%20used%20in%20english%20pdf PDF link annotation
    • http://maxiteguf.medianewsonline.com/28659428651.pdfIn PDF document text
    • https://cdn.sqhk.co/sarodeduz/jd7ige8/31593472050.pdfIn PDF document text
    • http://bitjoms.xyz/41244956855tnq5c.pdfIn PDF document text
    • http://perevod24-card2card.site/favorite_pokemon_of_each_type_templatetp831.pdfIn PDF document text
    • http://wowoxeje.22web.org/palezu.pdfIn PDF document text
    • http://dazixetenulega.22web.org/66041463218.pdfIn PDF document text
    • http://ryukzak.digital/35239544982b7wap.pdfIn PDF document text
    • http://gagerovovus.22web.org/29601679100.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/QCUTKji/15382827681.pdfIn PDF document text
    • https://cdn.sqhk.co/mixirulizab/vTciahe/84887318880.pdfIn PDF document text
    • http://sizuxubotinukor.22web.org/kibana_aggregation_format.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/jdggjfB/16119991431.pdfIn PDF document text
    • http://dnepr24.info/medical_tourism_guideghexu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_644d54a108dd4c4a8bf9b4258c8a8eb9.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/zebuluviveloludomiganupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d967d3ae-edc1-4b9f-903a-c23073e54ba7/96872042031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c805fb0-cf20-4314-845f-9aff741859cd/how_to_pair_altec_lansing_speakers_together.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_6c60fd9c43fd45148f557b3da2f0fe16.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fefb74-846d-4a31-9acf-7fefa3bbda4e/50593424694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e03c0b-849b-457a-8b56-0717d0ffec3a/fisher_paykel_dryer_reset_button.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_5b79e7b53e744e03bb6de00acbb5f4d2.pdf?index=trueIn PDF document text
    • http://lozepis.epizy.com/vapuxanakol.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_5bd5b026e7cc4fc4974a4e92c8bb700b.pdf?index=trueIn 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_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 5240 bytes
SHA-256: 9ad5569f5c2c0995e873ef67d0c3dfc09b8dadc7f1ba329bac330d20bc1e601d
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 11480 bytes
SHA-256: 5c72da97433f1dabf1eb991dd6e807970be5bffcda39dd59df20ccd4a41a5276

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