Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c62a2dd903c0269…

MALICIOUS

PDF

74.8 KB Created: 2021-04-17 19:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d45f000c14e0c92adb1316500ac252b8 SHA-1: 104bd3297207ba08c56b6159e579361e7ac2daba SHA-256: 9c62a2dd903c0269de87bafb39ea331d7ef142528ba72f622bc4e9ea35b3b502
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=calories+in+dunkin+donuts+power+breakfast+sandwich PDF link annotation
    • http://mufawajidoxe.22web.org/mutisolizeretipowozom.pdfIn PDF document text
    • http://xuwajofona.iblogger.org/resume_format_for_marketing_executive_freshers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutaxinasiva.epizy.com/comdial_phone_label_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c14beb5-2b31-40da-823c-da25b4ac0f08/how_to_meal_prep_keto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da5da70-f600-4717-8854-f97f87920159/learn_spoken_hindi_online_free_through_english.pdfIn PDF document text
    • http://vusanaxipunuli.rf.gd/mathematical_optimization_and_economic_theory.pdfIn PDF document text
    • http://vejemomase.epizy.com/89698257917.pdfIn PDF document text
    • http://sevajujumobilo.epizy.com/social_media_content_strategy_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d82c723-4f84-4cd9-a5bb-5bd1e82c434d/xuritaxakaxedap.pdfIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_27dd4b21f0a24769b362ae7628489f50.pdf?index=trueIn PDF document text
    • http://tupanukaxigazit.epizy.com/work_anniversary_card_template_free.pdfIn PDF document text
    • http://rawotagetanona.rf.gd/83552885378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77952691-130f-4ecb-96bb-d06740bb7900/roland_spd_sx_vs_spd_sx_special_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00735f7-bf49-4715-8e3a-f6e12fa9eb42/escort_passport_9500ix_radar_laser_detector.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_14bdf3468a234de9baad0adf48c88755.pdf?index=trueIn PDF document text
    • http://lipidojomodu.rf.gd/practical_clinical_biochemistry_by_varley_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affdb6cf-e56e-4dcb-af75-0fd7d8fcb284/dexulaz.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_3aae1aad64c34fb4a0ad88b4e6c5b021.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ded4933-c0d0-4af5-a7cb-87e243a3868e/american_red_cross_jobs_louisville_ky.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_off0000e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 5444 bytes
SHA-256: 07ccc4ef16b43671ed5d01163061b4c34ad10436239d0fb6ac341786363f25c6
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10832 bytes
SHA-256: f57b569d1a85e54c9aa63fec5cef705c1cc5f2bf702e4721e0e2569d89986e40

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