Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3e77366814142e…

MALICIOUS

PDF

73.9 KB Created: 2021-03-18 20:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12043b3393d22edcc2744f2310da883 SHA-1: 156e5e21c8b7d0ef38af809c78e72329e56a08e6 SHA-256: 0d3e77366814142eb79fc186ea1407997c0c6c9e9694d7b0d554bbd1dfb4c9f6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The ClamAV detection and ML classifier also indicate maliciousness, with the ClamAV signature suggesting a phishing or trojan component. The embedded URLs, such as 'https://midufefew.ru/award?keyword=canon+8800f+manual+pdf', are likely used to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=canon+8800f+manual+pdf
    • http://suporefebakibur.mygamesonline.org/canon_m50_tutorial.pdf
    • http://valigulepi.scienceontheweb.net/27960974489.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eb5d69e1-ce28-46f6-9507-d83790b29a10/55444567771.pdf
    • https://uploads.strikinglycdn.com/files/5987d3a5-e96b-4f6d-85ac-ca594eb66aec/4927980798.pdf
    • https://uploads.strikinglycdn.com/files/35f82066-537c-4798-acdc-61af9e9fa525/59490309800.pdf
    • https://uploads.strikinglycdn.com/files/873c91b0-1105-48fb-9a01-524a4a420209/why_garage_door_remote_not_working.pdf
    • https://uploads.strikinglycdn.com/files/05701d9d-2c62-4c40-a65e-c8944bab54fe/sundance_spas_drain_hot_tub.pdf
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_3967e621be0c45a4a51e0400317364c5.pdf?index=true
    • http://tirisesu.onlinewebshop.net/94297742676.pdf
    • https://s3.amazonaws.com/wofaxil/maths_formulas_for_class_5_to_10.pdf
    • https://uploads.strikinglycdn.com/files/2aa2eccb-fbc9-457d-9fea-ecf83b9023b2/52429475885.pdf
    • http://tipokeviti.atwebpages.com/altered_carbon_season_1_episode_1_synopsis.pdf
    • https://s3.amazonaws.com/jagux/shazam_indir_apkpure.pdf
    • https://uploads.strikinglycdn.com/files/5d117c06-5ed7-4467-b1b1-e37e09abb33d/whirlpool_washer_wtw5000dw1_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/91e5be23-870c-4053-95ee-a76b9829383f/why_my_battery_is_draining_too_fast.pdf
    • https://uploads.strikinglycdn.com/files/7f265621-d001-44b8-a33d-e1736fd2fefc/melugorebudavip.pdf
    • https://uploads.strikinglycdn.com/files/264356d0-2e41-409e-8201-7ff582d355b6/soccer_classes_for_10_year_olds_near_me.pdf
    • https://s3.amazonaws.com/zukogi/vsphere_issues_detected_with_selected_template.pdf
    • https://s3.amazonaws.com/fodose/48590227801.pdf
    • https://uploads.strikinglycdn.com/files/4423ce24-cdb7-486c-8289-441bdc2f75e1/how_to_save_google_maps_online.pdf
    • https://uploads.strikinglycdn.com/files/0c72d54c-fdb8-4d3e-a8fd-2577872e4819/lanezaronudubep.pdf
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_3c196d5c24534855a107c3a73a7ad3c1.pdf?index=true
    • http://xolavozezimodan.onlinewebshop.net/partidos_politicos_mexico.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bf.bin
9c206ae06a6e8e9bd87624a460156b6e15bb3b75ce10c4d69e2fc069fd233fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 5152 bytes
font_01_sfnt_off0000f63b.bin
60beb6b973297897bf91d19ff72ac51173fbc871ad2a685af5aef0d0a501c5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 10824 bytes

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