Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e44e508863275c…

MALICIOUS

PDF

75.8 KB Created: 2021-04-02 15:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 663bc8b584d2ee631a6a74f98ac3e410 SHA-1: a9cddcc5534cafd83cefbbe3d0f002784ef542b9 SHA-256: d6e44e508863275c953fc9f1f201e3947a366ebd71c16c1679f71b4d67705be7
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 external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a garbled attempt to present itself as a catalogue, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/award?keyword=ina+needle+roller+thrust+bearing+catalogue+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fe368274fc1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_6039d0e5aa2c2.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/33MlEmo/will_you_press_the_button_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/xgdhAgh/vesop.pdfIn PDF document text
    • http://prognoz-football.club/brand_identity_template_onlineb10da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5fdffd6bd8f79.pdfIn PDF document text
    • http://istlan.fun/quimica_organica_e_inorganica_ejemplos4kabb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5feb3865520ba.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/ibji9Ir/barbershop_movie_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_5feaf04ca0ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/vevajewez/0jj5ggU/pejibubomamiliwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_6062d94cd7e67.pdfIn PDF document text
    • https://cdn.sqhk.co/dosovejozeb/DZ6Vbjb/57380828706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_6028b77a15614.pdfIn PDF document text
    • http://glawerry.online/sap_fico_reports_tcodesvxm96.pdfIn PDF document text
    • http://foyou.store/fakujowiraw92i9.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/eRjgAgc/gofajurida.pdfIn PDF document text
    • http://cashthe.ru/is_rem_in_death_note_a_girlh7dxt.pdfIn PDF document text
    • https://cdn.sqhk.co/dusawugivepo/aRulhdJ/73945618923.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/gawabog/ntruhs_pg_thesis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/what_are_the_types_of_dachshunds.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/73200890665.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/mass_drivers_permit_restrictions.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/casio_g-7900-1dr_g-shock_erkek_kol_saati.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_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5492 bytes
SHA-256: 89ca99e695d24c15cf4a300b34b21a78c2379fcfb14b4be3c608041ba285fe10
font_01_sfnt_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 10680 bytes
SHA-256: a35cdbb3a742b356f5200832035374de59870d184da065e23050962cf76481cc

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