Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b29c0b8c301e1b3…

MALICIOUS

PDF

73.0 KB Created: 2021-03-28 00:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c3471088e9824323b1fb8b17487e412 SHA-1: 14912e0a3395f42d3d23c56e00997b405ac393d3 SHA-256: 8b29c0b8c301e1b35b57da8d410ae56ee8d5eee5daf18c84c48b22ce04fdfd54
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were extracted, the presence of external URIs and the overall heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/aws?utm_term=how+to+program+remote+sears+garage+door+opener
    • https://cdn.sqhk.co/jidulopavoji/dhwjdib/alone_season_7_casting_call.pdf
    • https://cdn-cms.f-static.net/uploads/4423136/normal_6023d7891934c.pdf
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/ebe25f405702.pdf
    • https://cdn-cms.f-static.net/uploads/4458621/normal_6009e0a5c4cee.pdf
    • https://cdn.sqhk.co/kugugofawaz/gjsgihj/metal_shooter_run_and_fight_video.pdf
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/nizuvija-nokib-fufije-wodeduxafedisiz.pdf
    • https://cdn-cms.f-static.net/uploads/4382784/normal_604ceace7bab7.pdf
    • https://cdn.sqhk.co/wojusipi/oUGQfzt/characteristics_of_living_things_graphic_organizer_answers.pdf
    • https://cdn.sqhk.co/zoxogatuv/uighg5F/divibaporenef.pdf
    • https://cdn.sqhk.co/farafakilof/3gcfEih/zumulotezanewugutuxepul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xamapebonijos/solubility_rules_worksheet_key.pdf
    • https://s3.amazonaws.com/perurulexi/75222064072.pdf
    • https://2108ee29-f41f-4224-afb3-8e24ca2f7712.filesusr.com/ugd/279473_8ff06c2422cb4e77879c3831db7bc3b4.pdf?index=true
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_37df442b046e43cc9855a77221cd0a6d.pdf?index=true
    • https://s3.amazonaws.com/numegubowalonan/61475080458.pdf
    • https://s3.amazonaws.com/jeromopelurab/berklee_performance_center_videos.pdf
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_3ca07d656f424597bf5b130d7b065732.pdf?index=true
    • https://s3.amazonaws.com/lakujusitejojet/django_template_set_boolean_variable.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_off0000d4ca.bin
d4ddaf78282dbaedf0a39ee7f01e2cda4a448ba303187213d2ffff3c25084d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 5040 bytes
font_01_sfnt_off0000e5dc.bin
8d6555ca9fcf186368c940cba97090214c3b8a66c2183e276177c2080667405b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 10052 bytes
font_02_sfnt_off00010853.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10853 4324 bytes

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