Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edf51d14b772b62…

MALICIOUS

PDF

82.1 KB Created: 2021-03-04 22:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 767abaca9efcc5d00d21331cadf6e54e SHA-1: d4f0f8291847678664cbf771d7078063dc47fcd1 SHA-256: 6edf51d14b772b6201558524eeb0ed7faefa3e343f41d39c3d619f81f78ebc92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://druttle.ru/strik?utm_term=how+to+replace+a+fuse+on+a+furnace PDF link annotation
    • http://lenugaguv.medianewsonline.com/what_is_the_poem_the_raven_all_about.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/jarutexavikodof.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/68939268818.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/operating_systems_for_pc_2020.pdfIn PDF document text
    • http://tasugur.iblogger.org/kufasabesitosumij.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/90946648711.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/xerox_workcentre_7845_cost.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://resilasijajatil.myartsonline.com/did_they_ever_find_the_missing_argentine_submarine.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/tumibaranaranixidovegidow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93b9a0c-b4bd-42dd-8acd-d45f4ccdd6c0/97698700155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e833e1-8725-498d-92ba-d2adcabdbea7/how_to_play_xylophone_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/4258700476.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/67297083157.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/nusuzaripibugirulix.pdfIn PDF document text
    • http://telatojewoka.epizy.com/parenofaxuxak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb126b26-5f6a-4402-b579-b6660f107487/sovitagerusuv.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/how_to_change_time_on_adidas_watch.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/is_salems_lot_a_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c316a560-9ace-48a9-9d25-3a8efc328f41/social_contract_theory_definition_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0db41d9-9370-42cc-ae90-eb10028b32e8/potty_train_in_3_days_or_less.pdfIn PDF document text
    • http://mewegojetit.epizy.com/artwork_installation_guidelines.pdfIn PDF document text
    • http://kiroxivox.epizy.com/savilewuwexaberofobuto.pdfIn PDF document text
    • http://kudukel.epizy.com/84744392822.pdfIn PDF document text
    • http://fukatotapi.epizy.com/30852163864.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_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 4896 bytes
SHA-256: a1182ea756b0189f0c52daabb495b7700fdf177badea073ded5d0ade65ad2ef3
font_01_sfnt_off00010921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10921 10304 bytes
SHA-256: 11fec40bac2361c920e2f41fd2f0175eb6b0998c0bae3ee7fbec2a58b0face9e
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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