Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f59172ccfcbd39…

MALICIOUS

PDF

95.1 KB Created: 2021-03-12 01:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6dc6db3e0ec8344e290a48bfab90a583 SHA-1: 947d2f81a3fecc6650973faa18f881e41175fdf4 SHA-256: 95f59172ccfcbd392fddda8f38c118a9dcd26d6e885e899e8007cbc52263fea5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains metadata related to 'Campath package insert pdf' and 'wkhtmltopdf', indicating a potential lure for users expecting legitimate documents.

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://ponafet.ru/award?keyword=campath+package+insert+pdf PDF link annotation
    • http://maximizator.space/monkey_racing_mod_apk_revdl25o3v.pdfIn PDF document text
    • http://ig-copyrightviolation.com/74128059333o10z3.pdfIn PDF document text
    • http://lumacy.site/49100038171myzbx.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/rekinazosuwapifaboso.pdfIn PDF document text
    • http://frankiearvelo.com/visabaxaguzidozidtwsm.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/likaruna.pdfIn PDF document text
    • http://kukushpa.fun/oral-b_professional_care_1000_electric_toothbrush_best_price7lwxe.pdfIn PDF document text
    • http://nimened.66ghz.com/88622578172.pdfIn PDF document text
    • https://wonusawe.weebly.com/uploads/1/3/4/4/134481200/3433716.pdfIn PDF document text
    • http://springtea.space/76277403099ho6gf.pdfIn PDF document text
    • http://womenita.fun/top_machine_learning_packages_pythonbl2ot.pdfIn PDF document text
    • http://springwin.space/35011552540yqg1h.pdfIn PDF document text
    • https://soneputud.weebly.com/uploads/1/3/1/4/131411150/kagusetakixorifobopu.pdfIn PDF document text
    • http://zerkalo-fugicar.website/49150730322kmu9x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://likifodafiduno.epizy.com/lowebunib.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/blue_dye_test_swallowing.pdfIn PDF document text
    • http://belinoremujuk.rf.gd/99276674877.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/google_chromecast_ultra_manual.pdfIn PDF document text
    • http://kobaporosonunaw.rf.gd/26927620686.pdfIn PDF document text
    • http://bulegenarofil.epizy.com/craftsman_circular_saw_cordless.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_off000136a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A2 5508 bytes
SHA-256: b5fc049e120aa29dc583725b487c498c70549fb88b4c48b1fcf453c282d222b7
font_01_sfnt_off0001492c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1492C 11032 bytes
SHA-256: 2fe423c4d9b569b4527a2949b653ac9c2a347320f37fe3927fcd2a70d3358a63

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