Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5642abaa6dd45b9…

MALICIOUS

PDF

81.1 KB Created: 2021-01-17 10:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d7447c0bf0c07da032bdacaf04ff8c1d SHA-1: 77622dd538845d4218c208651556478d984c188c SHA-256: a5642abaa6dd45b9734853cc1c1985d88b14194d67d5d497488e99b17cdc3375
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'trafffe.ru', suggesting it functions as a phishing lure or redirects to a malicious site. The document body, though partially corrupted, contains text related to 'Beats headphones user manual', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=beats+headphones+user+manual PDF link annotation
    • https://site-1176413.mozfiles.com/files/1176413/rinovopibaberepapulokako.pdfIn PDF document text
    • https://site-1172440.mozfiles.com/files/1172440/kepner_tregoe_root_cause_analysis_template.pdfIn PDF document text
    • https://site-1174695.mozfiles.com/files/1174695/25171638051.pdfIn PDF document text
    • https://site-1254769.mozfiles.com/files/1254769/46591954597.pdfIn PDF document text
    • https://site-1180682.mozfiles.com/files/1180682/anatomy_of_long_bones.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/air_attack_2014_king_of_sky.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/9333405.pdfIn PDF document text
    • https://site-1176776.mozfiles.com/files/1176776/new_delhi_amritsar_shatabdi_departure_platform.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/1756939bbab4.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/rixuroz.pdfIn PDF document text
    • https://site-1201795.mozfiles.com/files/1201795/sowaridepisodarezerala.pdfIn PDF document text
    • https://site-1245466.mozfiles.com/files/1245466/subokij.pdfIn PDF document text
    • https://sixoribena.weebly.com/uploads/1/3/4/8/134848884/a3faea467d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/amplifier_song_pagalworld_2018.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF436 5248 bytes
SHA-256: aebff7af510ba48e0eac1c94859efc31938a04c71f15185131fd1cdac671ee3f
font_01_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00011139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11139 11268 bytes
SHA-256: 0193dbf86871a3c5da09a4509ce7d31b7687dec270936cc2591cc842b69ca5b0

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