Malicious PDF — malware analysis report

Static analysis result for SHA-256 9949b01703e8dd5e…

MALICIOUS

PDF

108.9 KB Created: 2021-05-15 12:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 42c494ed94fce48cd486f95f39bb4a42 SHA-1: 90126035445c1031cc1b37f3899f456a1bfa967d SHA-256: 9949b01703e8dd5e3459eef4c65c21708f4dab7f3a613bbb91c1f34c1508dc77
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mezovuduw.ru/strik?utm_term=microelectronic+circuit+design+4th+edition+solutions+jaeger PDF link annotation
    • https://cdn.sqhk.co/bitubebo/jaicgha/spider_rope_hero_ninja_gangster_crime_vegas_city.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/1653810345gsrxc.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/idiighI/xovugogofumokilit.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/pghSijO/popular_power_bank_for_mobile.pdfIn PDF document text
    • http://parkji5x.xyz/weber_grills_cyber_monday_2020qvlgx.pdfIn PDF document text
    • http://deflecfcvy.best/gajovelokajutun0kgxf.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/gjAgfii/daladigiwiwevujed.pdfIn PDF document text
    • http://opt05.ru/18910092825yjv6n.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/fJhjBhb/62692291971.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/hfgdkgd/best_pc_driving_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/X6dNdhd/pamijajuvof.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/hevRje2/human_life_cycle_explanation.pdfIn PDF document text
    • http://varietystore.website/design_of_machine_elements_spotts_8th_editionyjilw.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xulikamul/32211340493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370b05cd-0542-4100-9658-02c77e58f273/arduino_sketch_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/99088397602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4235849-31a1-480a-855c-847e9c70a961/7_year_ache_chords_and_lyrics.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_off00014326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14326 2764 bytes
SHA-256: dd3836c8dfc199e23eef657e4d31a4371310052b10e9ac5ab41a9ead26f33f31
font_01_sfnt_off00014ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED6 5372 bytes
SHA-256: e7f5e245ca660d5377e60e282733fd125b31a7d6e555e42d28c408403ce202cd
font_02_sfnt_off00016126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16126 13932 bytes
SHA-256: fe9dc70f1790a5e49a68c8f4b2981170f0810f22d08670d6c29e71e2cf34bc2e
font_03_sfnt_off00019018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19018 16168 bytes
SHA-256: 13596defb2bcc6fc1048af8e1a4b019015f57a35384aba88f9e1637b8f94b635

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