Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea879cc4d9d18a3f…

MALICIOUS

PDF

74.3 KB Created: 2021-03-24 12:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6a6eff12ea8e581faa59c6cd26fc51cb SHA-1: cf642b898df8a7cdfc2a7466c651de5d419eced0 SHA-256: ea879cc4d9d18a3f583b1db4116b77f9ffd1cf2e85812fb0cdcafc9e7c341f15
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting a compromised site.

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://xajibur.ru/strik?utm_term=printable+world+map+with+country+names+black+and+white PDF link annotation
    • http://mnclassis.org/2628307712619nwu.pdfIn PDF document text
    • http://ellmax-site.xyz/amplificador_peavey_vypyr_75wpupnw.pdfIn PDF document text
    • http://good-production9.site/8463815983tkfgb.pdfIn PDF document text
    • http://juzikukunekaki.22web.org/93585793921.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/chgIha8/agneepath_video_songs_free_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/Cgehggd/super_pang_arcade_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuduwedimu/fjdifnB/85098609055.pdfIn PDF document text
    • http://euroshopmn.space/free_printable_worksheets_on_area_and_circumference_of_a_circle8sy7b.pdfIn PDF document text
    • http://gobotujadix.22web.org/61027541728.pdfIn PDF document text
    • https://cdn.sqhk.co/medipevagopu/agfHDib/gigovovopomo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamonoxo.onlinewebshop.net/libro_de_fisica_3_secundaria.pdfIn PDF document text
    • http://sazosubegus.epizy.com/zujama.pdfIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_ac0138e1d97a4693b5bded9cba7a0b7c.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_3e2c6d2b123b42bf8b0243b82e3c9dda.pdf?index=trueIn PDF document text
    • http://zotinebid.epizy.com/image_processing_algorithms_in_c.pdfIn PDF document text
    • http://jorowubibe.epizy.com/buongiorno_italia.pdfIn PDF document text
    • http://muzowagujojate.rf.gd/66739666424.pdfIn PDF document text
    • http://mirokukuvo.rf.gd/lepadujerej.pdfIn PDF document text
    • http://gegilifopom.myartsonline.com/what_was_the_iron_curtain_speech_purpose.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_off0000e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 5712 bytes
SHA-256: f3ff2701f35048f12c9215b41dda943723a48e75f186a97afcab602eeface32d
font_01_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 11048 bytes
SHA-256: 4ae770d381a5453f7683fb07cfe5b03782efa7e9ebe72357e46ec26a7d8eb331

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