Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e0dafbf147b953…

MALICIOUS

PDF

64.2 KB Created: 2021-01-24 12:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: eb2c2d660844c9b588e8337460941a53 SHA-1: 939b372a68a8128183edd92bf3d2a6e87e63b9a2 SHA-256: b3e0dafbf147b9538e92e604c1a591fc87e9f3bad9c7021dfeb97ddf66ba8980
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. ClamAV and ML classifiers identify it as malicious, specifically a phishing trojan. The presence of multiple external URIs suggests an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=cancion+bendito+bendito+sea+dios+letra PDF link annotation
    • http://jesofafisozosa.iblogger.org/apa_citation_format_example_with_two_authors.pdfIn PDF document text
    • http://zexawil.22web.org/football_jersey_design_template.pdfIn PDF document text
    • http://oyuncuxx.com/vadejepobovogifenelphyo.pdfIn PDF document text
    • http://zatuzosej.iblogger.org/etude_in_e_minor_chopin_sheet_music.pdfIn PDF document text
    • https://sipigatijuk.weebly.com/uploads/1/3/3/9/133999294/gudidigof_perej_molafib.pdfIn PDF document text
    • http://begemotiks.space/ranivunapewokajilexokemanhc32.pdfIn PDF document text
    • http://instapriz.online/phone_ringtones_free_download_mp36mleb.pdfIn PDF document text
    • http://morpeoplelife.ru/toy_crush_block_smashy9bgg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gowatane.rf.gd/97621155592.pdfIn PDF document text
    • http://girupesoja.rf.gd/vurafoxolosofuba.pdfIn PDF document text
    • http://bidexegope.epizy.com/soxegewuratugonebiviwe.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_off0000c1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FD 4980 bytes
SHA-256: 0815ab386cb170332d89f5b19181d5f6a1c7e147e2d8d940b6b7fe32fd83b1f8
font_01_sfnt_off0000d2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E5 9732 bytes
SHA-256: d6b1c4fd0ea89c60dbe15cc48295509095b12acc5a7847f23c4f2fc31ac8f935

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