Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fdb6be674152db…

MALICIOUS

PDF

100.9 KB Created: 2021-03-13 17:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9937639de0b0908ff1d1a836352ac480 SHA-1: 9d7cbeec96b1a34a53269b84e163fa03ec3fd29c SHA-256: 03fdb6be674152db4560bb0de159b4ade1289d6c760faade2846d7afda76385f
126 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous external URLs, with one specifically flagged as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the overall detection profile indicate a malicious intent to lead the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=poetic+edda+best+quotes PDF link annotation
    • http://gosoxegekiri.mywebcommunity.org/95722711448.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/GihZjib/chicken_drumstick_calories_with_skin_and_bone.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/hdsJ0ie/hellriders_pride_bg3.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/settlers_of_catan_card_sleeve_size.pdfIn PDF document text
    • https://cdn.sqhk.co/kusasuzona/iPjdFig/delutoluguxomiwilutajurev.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/aSTgdH8/governor_of_poker_2_premium_download_pc.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/werage.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/vVdcjjm/52212080097.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/canada_map_provinces.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a9d8c8-c7be-41f5-9916-790b1bf8141a/rebesez.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_f37c7d277b70472c9c8b747bc5c6811f.pdf?index=trueIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_70308f8b5471466b9f4438e180854e68.pdf?index=trueIn PDF document text
    • http://zonurupadul.atwebpages.com/kiwofexerurazusoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd9cb17-b74e-447e-8280-81917c6c0b1a/venelodanoxelomofuz.pdfIn PDF document text
    • http://zabamaxe.rf.gd/german_english_dictionary_kindle.pdfIn PDF document text
    • http://peledopa.myartsonline.com/electric_motors_and_control_systems_by_frank_d._petruzella.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/61273404070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07f7746-e72e-4600-8123-eb260aa532c6/the_river_wild_movie_music.pdfIn PDF document text
    • http://seviboki.rf.gd/55423375293.pdfIn PDF document text
    • http://tituroxir.rf.gd/full_volume_meme_template.pdfIn PDF document text
    • http://wilixafex.epizy.com/mujuxasotejaj.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_off000149fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FB 5072 bytes
SHA-256: a82c068a3e2920109779102e53a0131ddb1eb42f5a6b0b19f454fbcd848e9ab3
font_01_sfnt_off00015b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B47 13184 bytes
SHA-256: 9344d5fc4a0bd19ef0516416ce58da4d738ea56f77c8187969d4532871a65c40

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