Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9c14904202fc6c…

MALICIOUS

PDF

77.4 KB Created: 2021-05-12 10:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ccadb27b26e0c2663abd1f1cfd45da45 SHA-1: ecbd7965a5153fa9cd4b56ebcb40dc2a40696115 SHA-256: 7f9c14904202fc6cde9be83460c55bc0b9c2ec25a67cc0a72db2317a79726f37
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The presence of multiple disposable hosting domains and link farm characteristics further supports a malicious classification. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

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://gimoguvi.ru/strik?utm_term=how+to+test+immunity+after+covid+vaccine PDF link annotation
    • http://gamokidawenikon.iblogger.org/kerubegof.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/kaxofewobukuzejomusarave.pdfIn PDF document text
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/mukeponaj-zilumowol.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/a1fd5b61b9e.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/xP5haCk/talking_kitty_dunjan.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/bookkeeping_1_tutorial.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/fluke_77_iv_multimeter_specifications.pdfIn PDF document text
    • https://newogofifexepe.weebly.com/uploads/1/3/4/8/134884114/0371a0e4d.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/1iiGjfm/25860781374.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/7101492.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
    • http://mafevela.rf.gd/pigidukema.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/72220923265.pdfIn PDF document text
    • http://tixujuw.rf.gd/66419701366.pdfIn PDF document text
    • http://nitusubor.rf.gd/inequalities_on_a_number_line_mathswatch_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2bde55-e41c-4715-8171-4e5452328e2a/dino_hunter_deadly_shores_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de979116-24dc-4c94-8aaa-a9216f320ff2/cuisinart_convection_toaster_oven_broiler_tob-60n1ec.pdfIn PDF document text
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_f0fafe7a9a3f4032ae9231cff90e5f98.pdf?index=trueIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_488b6241aa1a430bb01b31bd5117b8f2.pdf?index=trueIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/80599470118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9312dc1-99fb-4463-bfe5-81b116f2baf7/90389405651.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_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 5232 bytes
SHA-256: 52ae7a81e8227c08a206fb661d06c4595145092fd355f18b467d1eff8d65c62b
font_01_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 10604 bytes
SHA-256: 38f8c7f829f43df5bc508a879feaafa60cd338872c0135acda4c98ff8765b5b1
font_02_sfnt_off00011a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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