Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bad8344256fb87…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 05:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 75f74b216f28e2715a3894b9e44e0882 SHA-1: 9f8b3a40ebf9b233ff1334615fd6cdc00263e959 SHA-256: 67bad8344256fb879e843aaca5c215089bc2c5ba10902ddb167ed4f39492052a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than a standard document, further supporting a malicious purpose.

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://maypoin.ru/123?utm_term=pandemonium+lauren+oliver+movie PDF link annotation
    • http://dunetetemob.22web.org/93316188838.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/best_place_to_learn_final_cut_pro.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/does_walmart_sell_hearing_aid_batteries.pdfIn PDF document text
    • http://kidepokapila.22web.org/78301526644.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/73633704547.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5ff6a7b0aa677.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fff013e71cdd.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/what_do_the_number_806_mean.pdfIn PDF document text
    • http://vabelenuketubup.22web.org/metal_gear_solid_1_how_to_beat_psycho_mantis_on_ps3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://texatutegelemov.rf.gd/50239524608.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/black_wallpaper_mobile.pdfIn PDF document text
    • http://ribigilubawedom.rf.gd/xibaduzulusorexudajajij.pdfIn PDF document text
    • http://nejuzuwesikodik.rf.gd/alphabet_phonics_songs.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/99469752090.pdfIn PDF document text
    • http://tutivute.epizy.com/kurasegowugo.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/remington_pg6025_parts.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/what_is_the_difference_between_folk_and_popular_culture_brainly.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5C 4856 bytes
SHA-256: f002953d3dd302d97ae1474cdf6a85742484b91205372b3d4b13ef97471e47e2
font_01_sfnt_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 12432 bytes
SHA-256: a7253de126b17ed03a102fb0bf7ba0b106d468e52d79d2b4b3cd8f5edffe98d0

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