Malicious PDF — malware analysis report

Static analysis result for SHA-256 62aaecbe41cf957e…

MALICIOUS

PDF

85.1 KB Created: 2021-03-20 09:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b09e323003233c48a2001481b0340552 SHA-1: c8a563c778f869d8f27f5b429dd59b4e5b5e779b SHA-256: 62aaecbe41cf957e8d69e03c3c5c790debb1a856f2bd6f4dcc06879082a10e00
126 Risk Score

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 0.9998

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://pelibifir.ru/strik?utm_term=how+does+lord+of+the+flies+represent+society PDF link annotation
    • https://cdn.sqhk.co/ruzivogawa/cjjEjac/android_2d_3d_graphics_opengl_tutorials.pdfIn PDF document text
    • http://vbruti.site/jikekipexefunetjeqw.pdfIn PDF document text
    • http://mezoterilijixa.22web.org/krajowa_informacja_skarbowa_bielsko_biaa_nip.pdfIn PDF document text
    • https://cdn.sqhk.co/wejuladuke/OUjboc6/job_interview_answers_weaknesses_and_strengths_questions.pdfIn PDF document text
    • http://mscredit.info/cuisinart_dcc-500_reviewsi9v1o.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/kopekikanoximpqmk5.pdfIn PDF document text
    • http://sovetnik53.ru/what_does_a_vegetarian_bodybuilder_eatpe3z4.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/je5Qhba/royal_caribbean_cruise_staff_pay.pdfIn PDF document text
    • http://teplotronic.ru/jorafuxexovm7s1w.pdfIn PDF document text
    • https://nogekapufininut.weebly.com/uploads/1/3/3/9/133997605/xawum.pdfIn PDF document text
    • http://organicsss.space/stiletto_nails_black_and_redigyqu.pdfIn PDF document text
    • http://zagiropi.22web.org/moldable_plastic_sheet.pdfIn PDF document text
    • http://nofovukad.iblogger.org/atkins_20_phase_1_food_list.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/141262.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/934222.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/3009068.pdfIn PDF document text
    • http://appletopshop.ru/mewaruxagogiwexezan8sbwx.pdfIn PDF document text
    • http://velesvoyage.ru/jafuwejozezujalananobadewpw9be.pdfIn PDF document text
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/0facb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopopujeji.rf.gd/jukojesujeviwugejigarof.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_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 5188 bytes
SHA-256: b3c706e664e1b7beebc22359005047ea635cef15ec546e381bcd00a99df32f78
font_01_sfnt_off00011f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F21 11132 bytes
SHA-256: a5faca5ea266bd821b12d1aa28addd5a1c8abca4e3fee66487f7b7dbeff3f92b

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