Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d439e0c409949ab…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 02:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ab165ca56812dc0ef6aeb6ad60ba5888 SHA-1: d3292b65efa108a883fe71f1a3ae735db129aed6 SHA-256: 0d439e0c409949ab34026beca89ca2ba67b70e05701af03fc4584e7e78f5d7e0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('resalured.ru' and 'doweryklkq.space') that are likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to database information, aligning with a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/award?keyword=base+de+datos+modelo+relacional+pdf PDF link annotation
    • http://doweryklkq.space/bully_apk_mod_data_obbjeviq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fe698e7d4ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_6013d5ea52e27.pdfIn PDF document text
    • https://cdn.sqhk.co/xivudebisov/zDUkWha/factory_upfitter_switches_ford.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ksibyU9/981013069.pdfIn PDF document text
    • http://wisecreditscore.info/41756442756jfogl.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/swiss_crs_reporting_deadline_2019ws6yv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_601361ca54247.pdfIn PDF document text
    • http://avtoshtorki.shop/97835345098oxne2.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/1EpNiiQ/darkness_and_flame_4_walkthrough_part_13.pdfIn PDF document text
    • http://detonic-ro.website/mewed_noun_synonymvchr8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0cbd072-bdd4-45ba-bf06-7d532203b8c8/how_to_tell_the_year_of_a_winchester_model_94_30-30.pdfIn PDF document text
    • http://silapopo.epizy.com/diviwuzakivevoropazazika.pdfIn PDF document text
    • http://mojadifo.rf.gd/mandated_reporting_pa_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521f4848-6a18-4329-8132-c4df33e6b067/how_to_listen_to_more_new_music.pdfIn PDF document text
    • http://joxekupad.epizy.com/parker_brothers_risk_rules.pdfIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_00f4876eeeb149ab81bde36bdb13d422.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/049ed19b-5aef-4254-96f3-509ba9d6916b/fakamujajen.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_a11e764a546541d58b174bcf7d3a80b6.pdf?index=trueIn PDF document text
    • http://tozibuxadotoba.epizy.com/24360399402.pdfIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_faaca2c13f0a4cd09151504856b4aa98.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_e429d3cf99f44b7781c0e7231a132aec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c53fac6-84f4-476f-9482-32a96cb3f0a1/is_oracal_651_permanent.pdfIn PDF document text
    • http://vedezaduxi.epizy.com/busch_liquid_ring_vacuum_pump_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba92c6c6-feb2-47e2-9e73-3c3a5c3e7137/bivekukakonufelasujidak.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_off0000f75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75B 5348 bytes
SHA-256: 2fcbb50ffb5d98a7b8251cb83353082e9b758dd78eb94fe72c82376688353fba
font_01_sfnt_off00010972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 11456 bytes
SHA-256: eba9686068542909994761c22714f9567b1a53772a19bc01211e5733165944bf