Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98ebc9b29ca4f12…

MALICIOUS

PDF

74.9 KB Created: 2021-03-25 16:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47418b759be5b3b3bd1ef45e2753c7a4 SHA-1: aff3cf2f1bb1b41119c03785d9c158f9f96c6318 SHA-256: b98ebc9b29ca4f121f81757f22b4c567054570c6a53dbbade165c0836a2a2c44
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and flagged as part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The presence of external URIs and the nature of the heuristics suggest this document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ponafet.ru/123?utm_term=schaeffler+bearing+catalogue+pdf
    • https://cdn.sqhk.co/veletafi/iiWnhf6/world_chef_hack_game_download.pdf
    • https://cdn.sqhk.co/kuzaxepigi/jhhf9He/33493000816.pdf
    • http://buvalopexur.mygamesonline.org/buffy_coat_preparation.pdf
    • http://kosonetibekub.medianewsonline.com/43322562553.pdf
    • http://mebevevi.mywebcommunity.org/pipom.pdf
    • http://lumosazef.iblogger.org/how_to_train_your_dragon_3_full_movie_in_english_download_filmyzilla.pdf
    • http://zonerokemub.getenjoyment.net/tasikifitimubupaz.pdf
    • https://cdn.sqhk.co/nopawuwam/ijegdLi/wugejotapirijupula.pdf
    • http://vowebipuse.22web.org/53869464465.pdf
    • http://moxegelubopidi.sportsontheweb.net/abraham_lincoln_life_story.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nuwiron.rf.gd/sample_template_for_expenses.pdf
    • http://wivufaw.epizy.com/bigobatuwaditasawemaz.pdf
    • https://s3.amazonaws.com/fibesezati/following_directions_worksheet_trick.pdf
    • http://xiwozoget.atwebpages.com/11172818323.pdf
    • https://s3.amazonaws.com/dikomavomem/pandora_box_6_manual.pdf
    • http://reviwegovamu.rf.gd/56455197480.pdf
    • http://nejimafalun.onlinewebshop.net/sixatuniruxosegiru.pdf
    • https://uploads.strikinglycdn.com/files/668e17f8-e7d9-436e-a2ca-0514ce815573/pubatojenezixaruw.pdf
    • https://s3.amazonaws.com/fezenur/game_cyber_hunter_lite_mod_apk.pdf
    • https://s3.amazonaws.com/wobuzisibal/jofer.pdf
    • https://s3.amazonaws.com/gotijejaj/63368976751.pdf
    • https://uploads.strikinglycdn.com/files/e747761f-9021-42b2-b6c1-b88f37e37f3e/my_samsung_led_tv_has_no_picture.pdf
    • https://uploads.strikinglycdn.com/files/9d94bf9d-5b80-4d59-80e1-3bb2c805e5ac/90316665261.pdf
    • http://satawakerexe.atwebpages.com/ielts_speaking_makkar_september_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db12.bin
4b6de433c20505ce7106501c91c66ad71f4bb5db80d364a9d500db9241ead79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB12 5364 bytes
font_01_sfnt_off0000ed35.bin
a06f7b331f6ef83c5dab2f3c87700355d21b4c2813c69f01c83b07935175b532		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 10264 bytes
font_02_sfnt_off00010fbb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 4324 bytes

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