Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc485e65164aca7c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-30 03:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6f83a627af391ebbd5b089447fedfad7 SHA-1: 291fc47771affebb24707727ef21d22caa7ad34b SHA-256: fc485e65164aca7c48ce75ec3c3aa8c78929baf051ef447ecb5ad55fbb0b34b0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to domains associated with link farms and SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though partially garbled, suggests a lure related to project feasibility studies, which is then used to host a large number of outbound links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=en+que+consiste+el+estudio+de+prefactibilidad+de+un+proyecto PDF link annotation
    • http://megatorg.ru/cambridge_primary_english_3qxc58.pdfIn PDF document text
    • http://realwockyc.info/21084561882bfwp2.pdfIn PDF document text
    • http://bluebadgeform.com/left_behind_book_3_free_downloadxolth.pdfIn PDF document text
    • http://makedctl.site/how_to_program_distech_controls_thermostaty62uf.pdfIn PDF document text
    • http://airned.ru/college_cookbook_barstoolpx78e.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/bufexa/the_dead_and_the_gone_detailed_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/megetesorigijovodunikoz.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/79829326128.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/kogomazadogexazim.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/58700950674.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/cascada_de_coagulacion.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/45383100697.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/o_level_mathematics_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/conjunction_but_worksheet.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_d3ba57f2c67a4ccc99759dc8e6bad6cd.pdf?index=trueIn PDF document text
    • https://ea29520f-fefa-4c12-ab21-0e0839e82572.filesusr.com/ugd/5d2047_fd30ce466a174547925da2481d4239a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/videoder_apk_2019_premium.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/noviledegemab.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_6eb475f926ea4003b5a23e0334aadb4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/17495556106.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/56032037179.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_6b61a4d3cc4a4a37848fc2f72d78bfcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/chiranjeevi_all_songs_come.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/beginner_trumpet_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/83948000207.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/5_8_sheetrock_screw_length.pdfIn 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_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 5472 bytes
SHA-256: bb6c9c57cb673d4cfcb2e93a699452db41e84020cf0e1a52546d95d32d591046
font_01_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 11432 bytes
SHA-256: 3b980ece22dccaefc94b556a802d1a9442378c1b683a972b8192670222faac6a

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