Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d4a766dfcf3cd6…

MALICIOUS

PDF

73.4 KB Created: 2021-02-27 14:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 141f7aafa4e7fdcd276abe8e996620c5 SHA-1: 9d3183a99ae93097305bfedab6a46c48612dc34e SHA-256: c1d4a766dfcf3cd6048ddffadb4c08d5056efdfae470d858253652eaa37c48c1
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links pointing to various domains, many of which are disposable or on suspicious hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

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://golowaki.ru/strik?utm_term=can+you+charge+big+jambox+with+usb PDF link annotation
    • http://freshmind.net/kajudivazelabapudufepzb715.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/BicRibt/hero_xtreme_200s_price_in_hyderabad.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/gi6jchb/recharge_rc_mod_apk_1._93.pdfIn PDF document text
    • http://indonesia2health.online/first_class_petty_officer_associationawwcv.pdfIn PDF document text
    • http://cg-designer.xyz/birthday_cake_decorations_for_baby_boyi0pz2.pdfIn PDF document text
    • http://arfeshome.com/best_self_guided_tours_of_scotlandon7y8.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/kevefatitumuzapa.pdfIn PDF document text
    • http://xuxuxib.iblogger.org/john_deere_110_parts_catalog.pdfIn PDF document text
    • http://italywom.space/effective_half_life_calculation_pharmacokineticswnq3t.pdfIn PDF document text
    • http://ruloposozaxekon.iblogger.org/chloromatic_3_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://felixoxajaxev.epizy.com/transformar_grados_c_a_k.pdfIn PDF document text
    • http://jujobope.atwebpages.com/8908815862.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/how_to_reset_combination_lock_on_briefcase.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/fawatesuvaradopetuluridik.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/20873627112.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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 5564 bytes
SHA-256: 75194f3c23aab32a67f310564f63ae1dd39ee2ac0549af4e851e0a0b923ad7f4
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10340 bytes
SHA-256: 000df0cd582ecbe1419cfdd427b854e339fa5ecd0a1ee8fd00e719ef66633617

Open this report in the interactive analyzer, or submit your own file for analysis.