Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3467550f4e0d4af…

MALICIOUS

PDF

81.0 KB Created: 2021-03-27 15:37:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 15ce06e4a3cf98a4f55ff7ecfed6cd04 SHA-1: aad4e56b9ec5bd891228056c0b1fd7c8e46a432b SHA-256: f3467550f4e0d4afb713d3f36e6b99c03ec1d846b2ce6aaafe3fd124136dc1f9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm or phishing lure designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF creation and potentially embedded links, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=applications+of+spatial+data+structures+pdf PDF link annotation
    • http://masito.space/46817277711ilf5z.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/brother_in_arms_gameloft_apk.pdfIn PDF document text
    • http://detonic-romania.website/gobalitetebipedemotenowk51eo.pdfIn PDF document text
    • http://tertov.xyz/the_guide_to_getting_it_on273jt.pdfIn PDF document text
    • http://jegexovavof.iblogger.org/96497837430.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/gjcictj/digital_marketing_apps_for_iphone.pdfIn PDF document text
    • http://healthit.space/85270897198bbane.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Ljagjzy/20904432592.pdfIn PDF document text
    • http://muzalovoga.22web.org/pegipadegefitejoputuvu.pdfIn PDF document text
    • http://energytik.net/sales_operations_interview_questions_and_answersminlb.pdfIn PDF document text
    • http://websporizlehd.com/bitmoji_chrome_extension_on_ipad1bqgf.pdfIn PDF document text
    • http://repaircreditscore.info/1051664329451yt1.pdfIn PDF document text
    • http://confirmationhelpcenter.com/ziwefiwonoxifbttk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/free_burda_magazine.pdfIn PDF document text
    • http://vedebimefawimad.rf.gd/ziwarozuv.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/41845181523.pdfIn PDF document text
    • http://lanuvurunipa.epizy.com/vosumaxotaxefomikife.pdfIn PDF document text
    • http://jupuzagap.rf.gd/sing_lyrics_travis_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/bully_ppsspp_gold.pdfIn PDF document text
    • http://digupekab.rf.gd/how_to_factory_reset_matricom_g_box.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/gijiliraguxezisilaxeg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 5140 bytes
SHA-256: f82b797058f79c920b1319ac5bc6cc4196d98596f3e7ffa2278991b37b8c5cea
font_01_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 10884 bytes
SHA-256: b34341ce1640b5665179e5684819e1c792eb5c0d4051e896c08b7a05795f76db
font_02_sfnt_off00011fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB4 16544 bytes
SHA-256: c64f975c7c74378765a15e192890ba001b575443647995d4109c17b56814fb1e

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