Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a90d01023d4672b…

MALICIOUS

PDF

85.9 KB Created: 2021-04-07 18:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 397243b0bf3e95928782ad2ecea98c40 SHA-1: b08bf45812ed0ed793884e8adeba9a06c6a12100 SHA-256: 0a90d01023d4672b5885f8387abdf2244e0840b5890f418ec9d8f5159ef12966
126 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 0.9992

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
  • 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://soxebez.ru/wix?keyword=chapter+51+animal+behavior+packet+answers PDF link annotation
    • https://cdn.sqhk.co/vikeguzag/ZxjjiaE/bosch_alternator_wiring_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/gasidonoda/iejfijZ/paritakomadiv.pdfIn PDF document text
    • http://neludetewul.22web.org/what_lens_do_professional_portrait_photographers_use.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/gjdpOig/formula_for_area_of_a_rectangle_and_semicircle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450747/normal_605fd4a1d7f20.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/idghhxk/lavozolifo.pdfIn PDF document text
    • https://cdn.sqhk.co/rewaloxuruvu/Rhc6enC/huawei_health_ios_review.pdfIn PDF document text
    • http://dapabikokewe.iblogger.org/72820380852.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/ja9lUha/rolling_stones_tongue_logo_origin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_6012eae7c83ba.pdfIn PDF document text
    • http://xopiredat.22web.org/74519966314.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/ZgdgiRP/digital_fitness_to_drive_medical_assessments.pdfIn PDF document text
    • http://donuzas.22web.org/83084284815.pdfIn PDF document text
    • https://cdn.sqhk.co/volumusigu/kxCJESF/24197309319.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/q3Lotgf/marketing_account_manager_jobs_near_me.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/547aab2f-6f3a-4c7d-bd94-7f650d7477f7/what_are_the_3_types_of_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc653e9-ae60-4a13-b8a0-894a1baef27b/a_temporary_matter_summary.pdfIn PDF document text
    • http://puwowega.epizy.com/36536006970.pdfIn PDF document text
    • http://waruzav.epizy.com/vuxojib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d952988-1a62-4d4b-95a2-8068d501d747/vexosazek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa056c6f-f4f6-46b9-bb97-b55639e637d5/is_the_smith_and_wesson_shield_a_good_gun.pdfIn PDF document text
    • http://pixibirorak.epizy.com/woxudevagifulaseviretuzo.pdfIn PDF document text
    • http://tuvatopuvonu.epizy.com/93315523450.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A8 5608 bytes
SHA-256: bfe30d04a1bff657b8ddf293138b8342091a62f701e692558044607ffbef1b0d
font_01_sfnt_off000125a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 10520 bytes
SHA-256: 3a14c5ee067b868981f239d74ddc5f49039299d489872abc0289540d80940e22

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