Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cad2ee90cb0110…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 01:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f6de9f9c0c729d96f6971e7484710cb SHA-1: f511dbab28a6d113ca6712d739d247c0577f7510 SHA-256: 86cad2ee90cb01108b5790204679bdf92e07bc4a25d47c551ed62e066c1e24b2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, with one such link pointing to 'https://golowaki.ru/123?utm_term=hdpe+plastic+sheets+near+me'. This indicates a probable phishing or malware distribution attempt.

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://golowaki.ru/123?utm_term=hdpe+plastic+sheets+near+me PDF link annotation
    • http://marketeuro.pro/sig_sauer_357_v_9mmw94lo.pdfIn PDF document text
    • http://bidimiw.sportsontheweb.net/napupitumawirujana.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/lawn_boy_customer_service_phone_number.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/4077054825.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/breathing_exercise_during_labour.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/citizen_eco_drive_skyhawk.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/mewogepa3b5wg.pdfIn PDF document text
    • http://reabook.online/ravadutejazixisalosovenubrc9t.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
    • https://uploads.strikinglycdn.com/files/5e346889-6f69-4086-9a4e-c5d09c07bea5/ginifomepixax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad42281b-5a12-4ddb-9e34-b61269f9cb8a/39498110833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73525f7b-86e7-478d-83b3-e25a6b7e7e67/5477795947.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/roxabexedul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1852ff-3ba3-46d6-ad45-91d64990f880/88066731670.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/why_is_my_fitbit_blinking.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/jang_newspaper_22_september_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277d4260-3c8f-4762-a97b-cc7b6e1f029b/17999412944.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/ineos_159_live_report.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/how_long_to_beat_battletech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14985d4d-6953-440c-bc08-fec4320101ec/john_deere_js30_carburetor_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d0c803-aaab-47bf-af71-3324d965f7ca/how_to_find_the_surface_area_of_different_shapes.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_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 4952 bytes
SHA-256: 395d6d1922d5fd296da8e586a0d3b8b99b7035e9a4c8bf082a7597044f753cde
font_01_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 10760 bytes
SHA-256: 3ca8be74aa3a0053cd92cfb3843b55606ff6960665cb53bdbe823604d45b1340
font_02_sfnt_off00012765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12765 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361