Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3afcca492265e2d…

MALICIOUS

PDF

86.0 KB Created: 2021-02-15 18:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 000e646d459ad948f403312f27d1097b SHA-1: 88edeecda0d7c17657a06eb7ded215120c0152ac SHA-256: b3afcca492265e2d462d245061591d36ea9b6122f63ef913b94b6f9859ba4fd1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=shaista+wahidi+second+husband PDF link annotation
    • https://cdn.sqhk.co/kobedobofepo/ecifCjc/jasejikalaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381318/normal_5fcfb7e6553b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472488/normal_5fe63e7153bfc.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/eLPBoie/67928106460.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/8C1OVjj/evoland_2_switch_review.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/cijbDjb/pickaxe_frenzy_tournament_time.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/RgeigdT/minecraft_bedwars_map_schematic.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/jcG2vib/nick_cannon_height_ft.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ligole/gabefiludimufozebomug.pdfIn PDF document text
    • http://revifobatuge.rf.gd/lejixubaxazuvugopad.pdfIn PDF document text
    • http://xunifavure.rf.gd/black_water_movie_2007.pdfIn PDF document text
    • http://viwapuzajor.epizy.com/3205327514.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/sofiwuvimap.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/surah_al_naba.pdfIn PDF document text
    • http://dexifuv.epizy.com/6995236510.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/sda_hymnal_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/aquatica_orlando_park_map.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 5116 bytes
SHA-256: 34a31fae866a79350fe73b72f0cd6e40d64775ba953e4dee99ebb47996922383
font_01_sfnt_off0000fff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 10132 bytes
SHA-256: 54c1d893fa1efa710315ed79c86d1dbdb84368a00faa298fbf37064724a95e25
font_02_sfnt_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 17352 bytes
SHA-256: 4dbe1c8997d1af98124e81bcc7244864d4a8437b5ac750e62a0ab81509effa2e
font_03_sfnt_off00013c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C11 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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