Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddd0e08d7a1861a…

MALICIOUS

PDF

68.3 KB Created: 2021-03-26 08:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 32faa3c08afeac095b4570418aa9106c SHA-1: 6a56729e93c2200f1b597576950e52638afc0aee SHA-256: 2ddd0e08d7a1861afc4286e546e7faaa97f1b772b0e5fd6f4e195a25d7500399
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external links, with one prominent URL pointing to 'vilenefex.ru'. The PDF structure and the presence of multiple external links suggest an attempt to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/wix?keyword=ab+lounge+ultra+workout PDF link annotation
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/6824676.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/oJihhf6/16651682804.pdfIn PDF document text
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/2543624.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/NFjdjic/chisel_and_bits_mod_1._14._4.pdfIn PDF document text
    • https://xeluwase.weebly.com/uploads/1/3/4/8/134850208/a550c3.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/hRgfShe/asteroid_crashing_into_earth_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/enRv6ie/oneplus_6t_power_and_volume_button_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/eXIhs6o/7_wonders_board_game_strategy.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/zotafosaxowonox.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/ihgjjgc/personalized_gun_shaped_shot_glass.pdfIn PDF document text
    • https://cdn.sqhk.co/famogidoje/Sjjjigg/steam_dropping_to_0_bytes.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/wXjejbu/long_distance_relationship_advice_yahoo_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/rhfgehj/floating_beer_pong_table_diy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sikuva/h_m_mens_jeans_size_guide.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_e3ca60de2fa4421c940954315ea3827c.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_fed5bb1948ac46c3a1a1474ea29b24a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/doubles_plus_one_addition_worksheet.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_6353d903246445a1b4ee7b4c6ef4b14d.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_1614b9bba3bf4ecdbe4886b0ce9a8992.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_7d499f0396a046e78c477e420bbfb0ad.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_45acea6515a947c198048c6abbae9ddb.pdf?index=trueIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_ad243d71928c420396766b22bd95c201.pdf?index=trueIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_168fdcc0d5874a9799dfae6ec90d636e.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_1148ef0732b74546bb6b16b3182578db.pdf?index=trueIn PDF document text
    • https://5b3a2631-baab-4d1f-8161-183aa5bfd7a2.filesusr.com/ugd/5dc2b7_71cef06fea09432e9824c6612ee585ce.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_off0000ce93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE93 4960 bytes
SHA-256: a1eb26aa990fa1077a02290f845f066f1b15cea41332a380bc4548e2a6e41ae5
font_01_sfnt_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 10444 bytes
SHA-256: de9cfb6a7ba00941cf9edbba505ee0eb5d141b19d9f826c7769e581ae43ed9e4