Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c112a0f35c55a8…

MALICIOUS

PDF

188.5 KB Created: 2021-04-27 07:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1bf9e23a4294baf82b4f0b57a6232d84 SHA-1: f6163eaf5ca8a12bebd9f06a52835107add57e87 SHA-256: f0c112a0f35c55a83cb45e463a6137f8e1930f21ab62b263f15c176e7aa9d324
126 Risk Score

Malware Insights

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

The 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 specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://soxebez.ru/strik?utm_term=what+are+the+natural+division+of+nepal PDF link annotation
    • http://dirtygirl.fun/nespresso_lattissima_plus_reset_factory_settings5gz45.pdfIn PDF document text
    • http://newsportstechnology.ru/894449488469ltn6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_5fda233fc6f09.pdfIn PDF document text
    • http://dombitarf.ru/how_to_get_rid_of_poison_ivy_rash_quicklyk5t3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcae91ba80fc.pdfIn PDF document text
    • http://wogamilip.iblogger.org/nalebiboziduwefaduz.pdfIn PDF document text
    • http://jojonavakuxuf.iblogger.org/qu_significa_soar_que_se_te_caen_todos_los_dientes_de_la_boca.pdfIn PDF document text
    • http://kikifikoxije.mypressonline.com/70654595393.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/msjgieK/download_tik_tok_video_without_watermark_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_601d76327f30b.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/gilewujemunxq4fy.pdfIn PDF document text
    • http://wavasesinile.22web.org/40960395392.pdfIn PDF document text
    • https://cdn.sqhk.co/foradimotiri/bz6hi5O/kusikitasude.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/biot_savart_law_derivation.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/depenetigafurujom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://mujeburesi.epizy.com/what_is_the_mileage_of_fz_v2.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/achieve3000_answers_soldier_in_the_wild.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/gedizenanuzaz.pdfIn PDF document text
    • http://bevakotus.rf.gd/airliners_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/view_formatted_xml_in_notepad.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/zeritawolojufedo.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/atm_card_apply_letter_format_in_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000299e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299E9 5200 bytes
SHA-256: f18521641cb469c574ba3a67d7267f2d08c20581a3f8ab41abc6aaa695c0ef4a
font_01_sfnt_off0002aba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABA7 12596 bytes
SHA-256: 4794a6db322ec6e91da83cb0fc95cc3b60c7446c72998a55cd7a8a54bb4832f0
font_02_sfnt_off0002d601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D601 3288 bytes
SHA-256: 4e6af31c006cfb9194edf91a4f41c6d8469ebe1fbcb85ebba9745fc69683df30

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