Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcde9a9026a17e8b…

MALICIOUS

PDF

77.1 KB Created: 2021-05-19 07:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c19d749e733787a3d9d9c2f2d9e4b321 SHA-1: e3d7144cbc070782ca73b17bdcd554b9250190d1 SHA-256: bcde9a9026a17e8bedd097cc9a156911ac9cd4c2bd856aead0efe770ae39a766
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://resalured.ru/strik?utm_term=libro+los+ojos+de+mi+princesa+pdf+gratis` is likely the primary lure, directing users to a site that may host further malicious content or phishing forms.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=libro+los+ojos+de+mi+princesa+pdf+gratis
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/1771084.pdf
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/mepetekux.pdf
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/jagujedoragu.pdf
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/8929556.pdf
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/8f5f8e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f0b89405-8dff-40c5-a4e0-cfeca4b3ed93/jakitovediko.pdf
    • https://uploads.strikinglycdn.com/files/1786a265-64b7-4bc3-b17e-51951c1feb33/lebopuwamowenonejuxodi.pdf
    • https://s3.amazonaws.com/kifutizijebuj/3d_max_cars_model_free.pdf
    • https://uploads.strikinglycdn.com/files/b883704c-f0fc-4504-9219-9a84dd7d668c/is_indian_tribal_income_taxable.pdf
    • https://s3.amazonaws.com/tigovatolis/mariam_khan_reporting_live_telly_update.pdf
    • https://s3.amazonaws.com/jigezilor/78322863130.pdf
    • https://s3.amazonaws.com/bipepezuwed/kyocera_e6560_factory_reset.pdf
    • https://uploads.strikinglycdn.com/files/81f1a672-c1fd-4d80-98fc-47aaa152ae47/flowers_in_the_attic_book_series.pdf
    • https://uploads.strikinglycdn.com/files/0c32751e-5198-4b2b-bd57-b99727700dab/motorola_g6_play_glass_replacement.pdf
    • https://s3.amazonaws.com/bipepezuwed/what_faith_was_cs_lewis.pdf
    • https://uploads.strikinglycdn.com/files/7ad4df03-2f7b-4105-87c3-d031b019cf3e/reziziz.pdf
    • https://s3.amazonaws.com/gedimuta/29067536833.pdf
    • https://uploads.strikinglycdn.com/files/70f3d358-6826-4ae0-a540-816c44a3ef42/65238561715.pdf
    • https://uploads.strikinglycdn.com/files/3e5ef2a4-f5a1-4905-ba97-42cc21fdb91b/36994418116.pdf
    • https://uploads.strikinglycdn.com/files/8f76b2c3-c1de-4e2f-8345-d7fcfa635565/93289178163.pdf
    • https://uploads.strikinglycdn.com/files/c54c7737-0fae-4747-9ca8-be46c8d25461/cbt_activities_for_youth_anxiety.pdf
    • https://uploads.strikinglycdn.com/files/d957a063-a9b9-4a59-b7d7-1004a6377ad4/pafosesutugoforujazerupo.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_off0000eb8f.bin
e4d0d912e0fb8b23d7790108bbf8b21095cc8139f4296d3377e5935c9ba2d21d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 5632 bytes
font_01_sfnt_off0000fea5.bin
4cfbf84760a9bd8a8f3ed68ffeabe80ea40c921d7282786f72d55fc5e4093997
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 11848 bytes