Malicious PDF — malware analysis report

Static analysis result for SHA-256 c364b42f34a2099d…

MALICIOUS

PDF

73.6 KB Created: 2021-03-23 03:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 795e026c112c259b30ffb6e2654a21bb SHA-1: c7cfa544e3624a45219788a6e32bc8a6878e91e5 SHA-256: c364b42f34a2099d56b5063e4d7ba838b9ce9b8d02f23b55e46a0e29b9741905
126 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or suspicious platforms, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to reference a technical manual, likely as a pretext to disguise the malicious links.

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/wix?keyword=gpi+flow+meter+a109gmn100na1+manual PDF link annotation
    • http://kopalirigel.mypressonline.com/xopubulaxebosedasejak.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/e4giheM/jumpstart_booster_box_mtg.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/giUsbPT/soap_cutting_games_unblocked.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/14578212210.pdfIn PDF document text
    • https://xajixaze.weebly.com/uploads/1/3/2/3/132302973/f24d86.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/d3hdpoH/angry_snakes_lash_out.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/hQRMfKl/world_war_z_season_3_2020.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/why_is_333_a_bad_number.pdfIn PDF document text
    • https://ranatugirebulox.weebly.com/uploads/1/3/4/0/134017659/7660041.pdfIn PDF document text
    • http://kijuguwosaxo.22web.org/dna_history_a_timeline_activity_question_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mefinuxewo.epizy.com/tourisme_gaspsie_guide.pdfIn PDF document text
    • http://lukirexuwi.rf.gd/64719100244.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/bleach_brockhampton_piano_sheet_music.pdfIn PDF document text
    • http://pewuzakij.epizy.com/bajenid.pdfIn PDF document text
    • http://relegutewaxo.epizy.com/82199896428.pdfIn PDF document text
    • http://sisubupofi.epizy.com/what_kind_of_charger_does_ds_lite_use.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/adventure_communist_mod_apk_3._5_3.pdfIn PDF document text
    • http://rasunafosav.epizy.com/azure_service_bus_queue_explorer.pdfIn PDF document text
    • http://vilogitiligifez.rf.gd/saparit.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/70116850025.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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 5516 bytes
SHA-256: 4b01fcdaf2f227a99d441971b7dd1639ece49d6462677adf4d523dbd99f701b6
font_01_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 10468 bytes
SHA-256: aa0e63025d4461c364eb5983e6c36908a99cf541d32c8e993f05b183ce189ffe

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