Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc2c5361212e732…

MALICIOUS

PDF

78.4 KB Created: 2021-05-07 20:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4c76142afb55dab6d1af171acd8071ed SHA-1: 05dca668915efac5e9a7b5a081df0b44eb756ef4 SHA-256: 3fc2c5361212e7327c2ad045f0c425847c74ea44ab52f5f7da046502ecd2953a
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, including one pointing to 'lozipotod.ru', suggesting an attempt to redirect users to malicious or deceptive content. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=cuanto+pesa+un+metro+cubico+de+agua+en+kg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415534/normal_600ada5868ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_605f2fb1a2b94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403557/normal_6000de1fe6f01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fcb6ba08c3d8.pdfIn PDF document text
    • http://gozuwifaw.iblogger.org/91998158051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guzupuxidulijak.rf.gd/32277443859.pdfIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_ffe8ac21c46342709049b0632fbed01a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3ef070-d109-4a07-82c9-1810722bfe68/the_5_elements_of_effective_thinking_download.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_832007e98f2a4ef1be61f0f116bdbe61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd71a0dc-184d-4ab3-96a6-e817538c9f43/medical_spanish_book.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_6ff9d068df354837909ccae35502f0c9.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_f3a592e2ec914529bcb6ec2caea59996.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3968f24-4a1a-49d6-9f31-28b80900dfca/english_grammar_tutorial_point.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_bcdffdf6ae244db4a63e5baeeff4ef9f.pdf?index=trueIn PDF document text
    • http://xonesopidazuju.epizy.com/puligakazusimobajejoveb.pdfIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_0f95b1566a694dfb999b05cba53ac421.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_ba8fa6b27fa44252b34fb1c106176f7e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/887d5519-cf26-445b-8666-00a995630cf7/42955470642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8012fd83-6134-4793-a080-f9bcecd2c662/53531595950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac34c518-8463-40ee-b47a-6be05d283edc/adobe_premiere_pro_free_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110884b9-8ca3-4e87-87c0-c9e7de3a1679/how_to_reset_a_ge_deep_freezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35216f83-6a6d-4c79-a623-21717af77b55/breitling_aerospace_evo_titanium_volcano_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59625a17-287b-4afb-b781-73f901b2ccda/pukidux.pdfIn PDF document text
    • http://xefalag.rf.gd/73956509201.pdfIn PDF document text
    • https://229c0a76-8cd2-4a6d-ad64-a548a1436bbb.filesusr.com/ugd/f9ed01_78aaddf431e74cedaa5cc592ebfc825b.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 5468 bytes
SHA-256: 56b7f205a4b0293e62207c2a314668fcc35437b0aab6c2b6f9a70f09717365fc
font_01_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 11848 bytes
SHA-256: e3a00704baad7774f20a4297fd6057ed6cb4cf588cd5aa376fc1644c9357a32d