Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf730e02cf8793f…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 18:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 38328bf4273c348f33c1447b48b32506 SHA-1: bd30df597d4b823bde1f2682c8d07baea016ce6e SHA-256: 8bf730e02cf8793f19484d92bf12898ede6aa7a711271a4db7a38c835c00b4b8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_CALLBACK_LURE' strongly suggests the document's intent is to trick the user into calling a fraudulent phone number, likely for a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt, potentially leveraging exploits for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/123?utm_term=buncombe+county+sheriff+reports PDF link annotation
    • http://fovoxarofej.getenjoyment.net/xufeva.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/2006_john_deere_320_skid_steer_reviews.pdfIn PDF document text
    • http://kinatoguvekajux.22web.org/vezosojexesap.pdfIn PDF document text
    • http://basiditdcf.space/zezusegupelesolodigu6p2of.pdfIn PDF document text
    • http://meetsalle.xyz/dell_precision_m4800_battery_not_charging3igd1.pdfIn PDF document text
    • http://fullpisetc.ru/actividad_integradora_modulo_4_semana_26klvp.pdfIn PDF document text
    • http://usmileofficial.site/fekisokgrn5.pdfIn PDF document text
    • http://detonic-ordina.website/959598183548nlmy.pdfIn PDF document text
    • http://copyright-supporthelp.com/aiou_challan_form_for_tutorship_20199honq.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/67198874447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_b614777de8a840dfb413a068de241939.pdf?index=trueIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_40ca14628ec54fae8069051c38a07dbe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dusined/balance_sheet_of_apple_2016-_17.pdfIn PDF document text
    • http://pejenusiloxo.rf.gd/bhagavad_gita_mahatmya_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/study_island_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/sidekataziwusokumazizuson.pdfIn PDF document text
    • http://rifoxadil.rf.gd/guwakuwoxilowisurevaj.pdfIn PDF document text
    • http://xotopusedewix.myartsonline.com/agile_project_management_ebook.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_8dad1fc1bcd447a0a942c1b47f96f63d.pdf?index=trueIn PDF document text
    • http://tivapatovike.epizy.com/which_is_the_best_stock_market_in_the_world.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_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 5304 bytes
SHA-256: 122a1d060a8ae190ba9f64f0b011425763077102991d49575bba127d5c304eea
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 10740 bytes
SHA-256: d7576c1f47d90f51c60b6bd124000dd3ec4c60436cca49ce24355177079f29c7

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