Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb392c747ede859e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-22 05:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4bbcae30e8284578f5a41f383990e75f SHA-1: 20e46090a019c2af4971a8b45db3e6ae40114ba1 SHA-256: eb392c747ede859eb6a2e46e0f8325f9c6004cb9775570735f2d1f3c4bf06c0f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. Several heuristics, including PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM, confirm this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution through the linked sites. No scripts were extracted, but the presence of numerous external URLs is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=base.pbp+download+psx2psp PDF link annotation
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/jowimu.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/CDjakh9/space_launch_simulator_build_a_spaceship_mod_apk.pdfIn PDF document text
    • http://myyshooop227.site/m._b._a_di_full_formrs10j.pdfIn PDF document text
    • http://itactical.xyz/kanmani_baby_songs_in_tamil4es6e.pdfIn PDF document text
    • http://afracheat3.xyz/how_to_drain_lg_direct_drive_washing_machine50z2a.pdfIn PDF document text
    • https://musibagufes.weebly.com/uploads/1/3/4/5/134587398/divupanofewapov-pixoxeko-lopunobeduj.pdfIn PDF document text
    • http://koreanluxe.com/5999173927555k2k.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/sample_articles_of_incorporation_ontario.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/futukagojifubi_koratedeluf_xunava.pdfIn PDF document text
    • https://ropupapufodugut.weebly.com/uploads/1/3/4/6/134650221/ddfae46e0ae5.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/GgeQWjc/hidden_object_enchanted_castle_hidden_games.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/how_can_edit_file_for_free.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/87935116791.pdfIn PDF document text
    • http://ecosbor.net/vujawipagowabufaxercukz4.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://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_1c82e718605046898d71cdd36ddb8117.pdf?index=trueIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_a160e0d0a9cd44ec83af20adc122fca5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 5032 bytes
SHA-256: 886db043700a5cbb42de0334c8f4a45ff194fe8229ba0130129e6519ca40dae2
font_01_sfnt_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 11380 bytes
SHA-256: 9b9db85a9b57e4626bf600e8e8499755df22baf26512230282a98c39d117a89d
font_02_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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