Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1890999fefc9897…

MALICIOUS

PDF

74.8 KB Created: 2021-05-24 16:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1415f0bfed2fbe3f3bc9e11aebe5415 SHA-1: c2105b919fa3bd2e895d186c1668ffdb1243dc54 SHA-256: f1890999fefc9897f9fcbcaba71365b861d511a6a0140187f38536e2a643f7fb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as movie download links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=aashiqui+2+full+movie+720p+hd+free+download
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/2617564.pdf
    • https://reperitibomotij.weebly.com/uploads/1/3/1/3/131383541/mebazakode.pdf
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/fafejegero.pdf
    • https://movabeze.weebly.com/uploads/1/3/0/8/130814110/1783976.pdf
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/97968e4417.pdf
    • https://dasiwijumajofep.weebly.com/uploads/1/3/0/7/130739595/vifugaxobige.pdf
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/03da28ef6c45.pdf
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/ba9f92b89456.pdf
    • https://wegoboxup.weebly.com/uploads/1/3/4/7/134772399/ad50692.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pirofopafu/kurojufuradefozebopa.pdf
    • https://uploads.strikinglycdn.com/files/1b2d2a4a-9888-4a5b-8ae6-00081cebabbd/72261114115.pdf
    • https://uploads.strikinglycdn.com/files/c175ca37-f51f-464c-b3e4-fefe49855ac2/romeo_and_juliet_film_1968_online.pdf
    • https://uploads.strikinglycdn.com/files/389b5cba-95d9-48dd-abcb-3530e0285b8b/in_a_dark_dark_wood_full_movie_release_date.pdf
    • https://uploads.strikinglycdn.com/files/7f48677b-e096-4d62-90fc-fabadf4e0640/what_is_a_speech_preparation_outline.pdf
    • https://s3.amazonaws.com/xukonakefules/kewuladegexosizexogiv.pdf
    • https://uploads.strikinglycdn.com/files/b2aa6be7-e5b9-45a3-a6f6-2d68f810a550/xezagudilexotuki.pdf
    • https://uploads.strikinglycdn.com/files/ec77a562-31db-41d2-a745-8e8f53e96caf/mabuf.pdf
    • https://uploads.strikinglycdn.com/files/1ca49919-399c-4eea-aafc-23b7201e4362/how_to_pair_a_hp_wireless_mouse.pdf
    • https://s3.amazonaws.com/kodipopujufipig/what_causes_high_blood_pressure_headaches.pdf
    • https://uploads.strikinglycdn.com/files/657c8ef4-6dfc-42c1-bfcf-0eed6f624213/stephen_king_outsider_book_summary.pdf
    • https://s3.amazonaws.com/zetituri/oracle_fusion_intercompany_reconciliation_report.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_off0000e4c7.bin
f069d60117a8a0674d0bf684e21ad842e5e4cbba9b3d2334ddcd39610fa86f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C7 5900 bytes
font_01_sfnt_off0000f8d7.bin
1b60de5933ca590114ed6c149cb7604d8e3bb1e7c48db52ffb2016fa78c16885		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D7 10732 bytes

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