Malicious PDF — malware analysis report

Static analysis result for SHA-256 053684cdf85aac05…

MALICIOUS

PDF

73.2 KB Created: 2021-03-18 14:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 094323f16cd786850bbab4aa44135083 SHA-1: 2c223815f11515ee6fca3d648ab042ced64906f0 SHA-256: 053684cdf85aac05167966ea8fcc2cd8f58c362ceeb02de55470feeb1e213017
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=coleman+portable+spa+error+codes PDF link annotation
    • https://wazalopa.weebly.com/uploads/1/3/0/8/130814586/8283368.pdfIn PDF document text
    • http://gilitomenuxame.22web.org/42380719606.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/rubiveseson-kusevevazota.pdfIn PDF document text
    • https://lonofajizol.weebly.com/uploads/1/3/5/3/135389348/netanorajexatafot.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/where_rainbows_end_cecelia_ahern.pdfIn PDF document text
    • https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/fasakojokoze-fovolunur.pdfIn PDF document text
    • https://petugureb.weebly.com/uploads/1/3/4/4/134445868/18fc4.pdfIn PDF document text
    • https://mivixotagu.weebly.com/uploads/1/3/1/3/131384173/kazumikefatavet.pdfIn PDF document text
    • https://tivavazo.weebly.com/uploads/1/3/5/3/135337759/2758876.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/felabixisuma.pdfIn PDF document text
    • https://febasenijig.weebly.com/uploads/1/3/1/3/131379808/7377523.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/76392493378.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/vekufomomi.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/cef2f9a3-5884-412c-87c2-388d7aecff5e/torivojotibazorejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45fc4b7-90a3-4e23-86bf-6b3d20c3a10c/xaroti.pdfIn PDF document text
    • http://tibimixokafif.epizy.com/goodnight_gorilla_large_board_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f957dd-d20f-4be2-b7ec-e5c959da4c02/a_history_of_europe_in_the_modern_world_12th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54c4681-93de-4491-a12e-9554a6b385cf/bear_whitetail_2_compound_bow_review.pdfIn PDF document text
    • http://pujekejiwevote.epizy.com/taking_sides_clashing_views_on_social_issues_20th_edition.pdfIn PDF document text
    • http://sefogapilaz.epizy.com/36279947476.pdfIn PDF document text
    • http://vonizevugopu.rf.gd/aaru_movie_songs_please.pdfIn PDF document text
    • http://dogefifuga.rf.gd/75915393363.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_off0000e033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 5264 bytes
SHA-256: dce51c1fe8b928829dc1750ca8f675086d4dff50515ba7ea8ed2455197048666
font_01_sfnt_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 11016 bytes
SHA-256: 375132ebaec344b401b74043ff87e4039ef76a0e7c2ba25a6c73c7b6f3555bc9

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