Malicious PDF — malware analysis report

Static analysis result for SHA-256 000f84a0107be5dd…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 11:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f10c591f843a22ba36c8071a45725590 SHA-1: 973a60fcaedf6b530a5f9062b0eb7a1383b32dce SHA-256: 000f84a0107be5dd7e2085e4dcc0a21a994e350817e3204c445de003ed19d2cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=mini+militia+money+mod PDF link annotation
    • http://irina-beha.com/ckfinder/userfiles/files/dewubixopopisud.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///jatagorokugaza.pdfIn PDF document text
    • http://plise.org/userfiles/file/mobowipidakotuwiguj.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fc710e954---nadigiwot.pdfIn PDF document text
    • https://kokomanis.com/contents/files/83433134475.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109041958235487.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/rajap.pdfIn PDF document text
    • http://simoncaulkin.com/images/wetupaguzoraxakefapizepa.pdfIn PDF document text
    • http://yoron.net/up/files/61653403985.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/62863608979.pdfIn PDF document text
    • http://synhbio.com/upload/files/26929077239.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/7303201193.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/22247858532.pdfIn PDF document text
    • http://ustunongel.com/image/files/23559157170.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/vovotesusuxijogagebip.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/6135ce5e0020d.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/53383877377.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109080505563938.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/migawasovudavudaraduli.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/66880217403.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/bunobaguvukur.pdfIn PDF document text
    • https://manenshop.com/upload/files/62708163358.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/lavilakonin.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/petosixuwogi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 10248 bytes
SHA-256: 07a7cfbc1c7251b161e3a078c898d4738cf8c213b020eb6307e4d29651bdaa5a
font_02_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 17100 bytes
SHA-256: 287a20ff771970a9a101f6eefc3ae3e69ccdd4d384cd5d023b1b9160c2a03a7f

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