Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e8a203e3e06120…

MALICIOUS

PDF

73.5 KB Created: 2021-02-20 20:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e95bf75598be8d1309674076f2eff8cb SHA-1: 9f53a59c6b272a075513fffaffc149290045b464 SHA-256: b0e8a203e3e06120b8e673e1d6f316915528299e283fca49efdb24aa887d3a6a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear textual lure. The presence of numerous external URIs and the overall structure strongly suggest this PDF is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=the+house+on+mango+street+discussion+questions+answer+key PDF link annotation
    • http://marafonsport.site/download_video_instagram_iphone_2019wz9nz.pdfIn PDF document text
    • http://trenketo.buzz/drive_ahead_hack_2020_ios99wj3.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/5963191.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/vagizazakolexezepazererhvsn4.pdfIn PDF document text
    • http://sefajoga.iblogger.org/eeoc_investigation_report_template.pdfIn PDF document text
    • http://zegofivuwirukon.22web.org/electrical_circuits_worksheets_for_grade_6.pdfIn PDF document text
    • http://lujuvudav.22web.org/associer_entre_eux.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/1737292.pdfIn PDF document text
    • https://sajipetifejej.weebly.com/uploads/1/3/4/8/134883768/8fc02d73c0.pdfIn PDF document text
    • http://manoligixave.66ghz.com/game_my_talking_tom_angela_mod.pdfIn PDF document text
    • https://bimipesetasezi.weebly.com/uploads/1/3/4/0/134017520/6960721.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/9831293.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/58249278031.pdfIn PDF document text
    • https://fuzefiwojagolo.weebly.com/uploads/1/3/5/3/135308179/6169991.pdfIn PDF document text
    • http://trikolor.site/747829666962elo6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedonufil.rf.gd/73500869504.pdfIn PDF document text
    • http://vabuperupijod.epizy.com/madegipivuxixojasudenoga.pdfIn PDF document text
    • http://zujebagita.epizy.com/a_major_reason_for_us_involvement_in_latin_america_in_the_1980s_was_to.pdfIn PDF document text
    • http://puxetixunelotaz.epizy.com/how_often_to_feed_daphnia_to_fish.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/rijavibasipadipolipilizim.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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 5656 bytes
SHA-256: b3ccb0d57616657d0b8b0fa3406c5c16964ec45a74abca9d97a9aa775d2cab5c
font_01_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 10368 bytes
SHA-256: 8357158abae8729c33b81507eaff21669f532b64af6e92c78a84826967f8be86

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