Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68a263752afc5b5…

MALICIOUS

PDF

68.7 KB Created: 2021-01-21 01:55:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 048db7c6afcbff5be9afbf909f4f6208 SHA-1: 12650b2e60878780082cd5b5027ce1ebd9d3c443 SHA-256: f68a263752afc5b5a28a9a9536d3549dbacf282073c7ec1a4314f0e2b900a265
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to online shopping and billing addresses, aligning with phishing or malware distribution tactics. The presence of external URIs and link farm heuristics indicates an attempt to redirect the user to potentially harmful content.

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://bologen.ru/123?utm_term=billing+address+meaning+in+online+shopping PDF link annotation
    • https://cdn.sqhk.co/feripamapuv/Jmihcha/rc_car_clubs_near_me_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368501/normal_5fc4d44574af6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fab19b4a2c3c.pdfIn PDF document text
    • https://site-1222450.mozfiles.com/files/1222450/best_video_converter_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489263/normal_5fe30896db923.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/ighOSZa/rolozevo.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/aaheFhb/19588831677.pdfIn PDF document text
    • https://site-1178548.mozfiles.com/files/1178548/10370428646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_5f98b386e321a.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/ZSILRmh/card_making_with_cricut_air_2.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Okhda7r/22649180422.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/hjjpIsD/brain_games_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/vGhhhgY/hideki_tojo_role_in_world_war_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugivazule.rf.gd/about_love_birds_information.pdfIn PDF document text
    • http://nulesuli.epizy.com/folituwamuvirimol.pdfIn PDF document text
    • http://widafasamuj.epizy.com/28770654489.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/nurotuwawibiwigivazog.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/nuluxo.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/19319529473.pdfIn PDF document text
    • http://losikamadan.epizy.com/free_printable_community_helpers_worksheets_for_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/4611590691.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_off0000cfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 5420 bytes
SHA-256: b3b879faf83cbe9887b9ef591d7136928595af86fab55ac1d83d6be6de2d2638
font_01_sfnt_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 10480 bytes
SHA-256: baa40e1f18d5c16be10e7fb6a181c397f454a5370333e0c3878ef2d9c57f8355

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