Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9526465474b65b9…

MALICIOUS

PDF

66.5 KB Created: 2021-02-26 01:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6730d8f02fa52db520deec143734aebb SHA-1: b22bbddf7420e25a1b586c132627c3f10e1a9ecc SHA-256: f9526465474b65b9aab31cfca6f5ce6426d50f8049cbec19314e9258ec10951d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'sports heads soccer cards swap unblocked' and mentions wkhtmltopdf, hinting at a potential lure for users seeking specific content.

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://maypoin.ru/wix?keyword=sports+heads+soccer+cards+swap+unblocked PDF link annotation
    • https://cdn.sqhk.co/natokaze/hIfLhg8/fazedozojod.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/constructing_polygons_worksheet_grade_6.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/jcghBrz/gartner_symposium_agenda.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/fiaURhd/bopuvul.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/add_footer_to_wix_pagekshnf.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/pegasigefadopezoj.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/eibZhhC/startup_cast_season_3.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/47569215481.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/73544748528.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/wazixazeruvanuvopijajaj.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/CBmGigW/new_call_from_cartoon_cat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5ff324877a0a6.pdfIn PDF document text
    • http://coolstudent.space/huffy_disney_princess_bike_trailer9osz3.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/infinix_note_7_phone_price_in_kenya.pdfIn PDF document text
    • http://nakozek.mypressonline.com/easy_math_questions_for_grade_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/rocket_stove_combustion_chamber_design.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/jagagif.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_off0000c868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 5560 bytes
SHA-256: 380b83274056fdf25461ab37d7684c6ad74b1bb0506d325dc170d249856d8321
font_01_sfnt_off0000db4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 9828 bytes
SHA-256: d16f8c5e6bbf84004dd1cdb06300eefd522757ba465c80462b0f1450ea339a39

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