Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d880f90a14c3be8…

MALICIOUS

PDF

75.1 KB Created: 2021-02-19 02:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 459695513d06b6f20314179e81720458 SHA-1: 70b167f980d8f11e33b61856cc1169909353be57 SHA-256: 6d880f90a14c3be853a717a3d9ee4a7fc3b984963dde03e6e702af4c3badad3a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily corrupted, contains text related to football memorabilia, suggesting a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=how%20much%20is%20my%20football%20memorabilia%20worth PDF link annotation
    • http://ketousa.site/52389778227e73bv.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/gLbha6H/open_world_racing_games_android.pdfIn PDF document text
    • http://fabulouss.space/vumolagararutibeqilk7.pdfIn PDF document text
    • http://midumadataresut.66ghz.com/24624669884.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/lsiInij/70053027336.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/ejavCgf/fijelinijusegun.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/ZSnhjdv/jogifef.pdfIn PDF document text
    • http://discout.online/causes_and_effects_of_divorce_essayvcud2.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jbihjjs/72811643870.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/46804908374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/screamin_eagle_pro_tuner_software.pdfIn PDF document text
    • http://jolivawojo.rf.gd/abbyy_transformer_3._0_crack.pdfIn PDF document text
    • http://suvapik.epizy.com/exercise_and_meal_planner_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/radujuru.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A3 5416 bytes
SHA-256: 05ee3ddb3ffd050e11357747dc734fe52b2bb1e64eceb2b60a0c2a1ee751a236
font_01_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 6524 bytes
SHA-256: 20a7a01ffe30c8e9e47dabcde25ce918e087158d1bbaf66c2d7c3651539f3e92
font_02_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 9732 bytes
SHA-256: eaefece42f0499809f34e9fd1cb949390ed4ffe05339ec116b9e1806dad3c598

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