Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f51a48f61b72f2…

MALICIOUS

PDF

77.3 KB Created: 2021-03-04 21:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2af769228bad78842cbfbea80ff5c748 SHA-1: 8e986265cf6154bed97ca185cd6fed2fdbfdd3aa SHA-256: 62f51a48f61b72f2eaf6aef84e1401a8422f7402b76508c443ed887c9b323749
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though truncated, contains keywords related to troubleshooting, likely a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/123?utm_term=gtd+audio+g-622h+troubleshooting PDF link annotation
    • http://dominis.xyz/dapuxef6oy0p.pdfIn PDF document text
    • http://form-copyrightservices.com/using_conjunctions_worksheet_year_2pp34p.pdfIn PDF document text
    • https://tisefujuset.weebly.com/uploads/1/3/4/4/134488269/lodajexi.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/cRUgdjd/drive_in_movie_theater.pdfIn PDF document text
    • http://ewwe.space/kepakomubovutiet5m8.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/nagedaretixe.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/zehjieE/rudipijigunole.pdfIn PDF document text
    • https://fupevigojajoma.weebly.com/uploads/1/3/0/7/130738700/vunebof_xibuka_ravurojufed.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/71f4a759344c.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://zuvineduwofuxo.epizy.com/65368634550.pdfIn PDF document text
    • http://muxopuwe.epizy.com/visunetibepupevarokub.pdfIn PDF document text
    • http://nokefibazapowem.rf.gd/7846694417.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_bd97a7ea434749eb82ba985d4b667fc1.pdf?index=trueIn PDF document text
    • http://viporikapopafep.epizy.com/2016_gmc_acadia_driver_information_center.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_8c89233e19ce4691a70a60a9d5e93c61.pdf?index=trueIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_48b3ea7b44524b13aa5f8b978311abd8.pdf?index=trueIn PDF document text
    • http://kufobidup.epizy.com/7368556529.pdfIn PDF document text
    • http://wuzuvulas.epizy.com/angular_formarray_remove.pdfIn PDF document text
    • http://bumupumelagel.epizy.com/lexmark_e352_photoconductor_reset.pdfIn PDF document text
    • http://wofogadopa.rf.gd/73663056871.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_off0000df4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4A 5460 bytes
SHA-256: 6e64395d0ec73b007c857882793763786068c1f1f51a07f35a1ea9ea5f21343c
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 11136 bytes
SHA-256: 134ab3dda486f0569fcb9bc30f89787a72c0dddf3950be6ebfb98eb9e091ba78
font_02_sfnt_off000117a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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