Malicious PDF — malware analysis report

Static analysis result for SHA-256 832ffb3fa8c2e47b…

MALICIOUS

PDF

88.8 KB Created: 2021-03-31 22:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 49ebbf1bf39d45f7b8139f73d2f7d23f SHA-1: f040b5d81dbc0dde404c21f0077ecfce6ecc7817 SHA-256: 832ffb3fa8c2e47bba562b5a2f7c5e9f7d0246f601a74776996a5005aa120986
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 an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host malicious content or phishing pages. The document body, though truncated and obfuscated, appears to be a lure related to a song search, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mezovuduw.ru/wix?keyword=best+song+off+testament+the+gathering+of+israel PDF link annotation
    • https://cdn.sqhk.co/tinulafi/fjbibCE/rumifage.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/ifNDhb8/74206975828.pdfIn PDF document text
    • http://mnclassis.org/vuwimekuxidiratojofmge3.pdfIn PDF document text
    • http://itdiscounts.info/soccer_training_program_for_youtha9w9l.pdfIn PDF document text
    • http://prechambre.xyz/xudevinupeduo3czs.pdfIn PDF document text
    • http://detonic-italia.website/free_ringtones_for_iphone_5s1nomi.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/9qcb0nf/85282588080.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/dif2hfW/81525928848.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/geometric_distribution_and_cdf.pdfIn PDF document text
    • http://manthoughtswebsite.website/pronoms_relatifs_exercices5g7qf.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/YibqgiV/94002696269.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenemu/E5Miagg/monster_trapper_bug_killer_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/hg3hdgg/mobile_soccer_league_apk_free_download.pdfIn PDF document text
    • http://lusoxokurutugap.22web.org/lenanojabevifemasakepo.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/woviretofokenipetux.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/gfrXiga/fake_call_for_bendy_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/3hfifB1/radiosender_metal_rock.pdfIn PDF document text
    • https://cdn.sqhk.co/zakikola/RQGbrG2/storyline_online_clark_the_shark.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/61953646-ccbd-43e6-abcc-bd5cbc54010b/irregular_er_verb_conjugation_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546ef83a-3091-492d-b668-80d2c9fbd961/xuxopuditulitetoruwarate.pdfIn PDF document text
    • http://fokomigazojifa.epizy.com/how_to_measure_montevideo_units.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28051fd-ce4f-405e-bd52-1a0502eb129d/netbeans_tutorial_point.pdfIn PDF document text
    • http://jepatejefa.epizy.com/drenagem_linftica_manual_doi.pdfIn PDF document text
    • http://ragibotaja.epizy.com/97276347813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1366bd-d6b7-4b41-abe4-8317d276f732/lord_of_the_rings_4k_digital_intermediate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2d55df-1f2c-4c58-a16e-fabfd62825a7/12140191113.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/satyanarayana_biochemistry_5th_edition_download.pdfIn PDF document text
    • http://lituvatitibew.epizy.com/pisusawufejesamaxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11233 5020 bytes
SHA-256: e5644e1fc7adf59c0db6dfd32dc3bd1b53993a81d12600c532ea7c546f9a6ac2
font_01_sfnt_off0001230b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230B 10656 bytes
SHA-256: 651b632eb24c17bf4d1ffc13fb89ec9b1266f945eedb2eae4a9541449d9f94fb
font_02_sfnt_off00014710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14710 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378