Malicious PDF — malware analysis report

Static analysis result for SHA-256 807fbd0ef8ddd928…

MALICIOUS

PDF

70.1 KB Created: 2021-02-21 16:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4523596a18b0f67faa7781eb3c2c2c15 SHA-1: 266374cc846cda78e5221a496b5ae5fb112c80ca SHA-256: 807fbd0ef8ddd928a38064f99fb4f7ba763a08b411bedd850dd8f62670d33238
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are disguised as search results for specific documents, indicating a likely SEO-based link farm or phishing attempt. The presence of a critical heuristic for PDF link farming and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a mechanism for redirecting users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=hamilton+beach+big+mouth+juice+extractor+manual+pdf
    • https://femidizori.weebly.com/uploads/1/3/4/6/134684525/8503223.pdf
    • https://cdn.sqhk.co/gorokipo/b8jjdfs/55855942705.pdf
    • http://gusanod.22web.org/xoxotevu.pdf
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/derigi.pdf
    • https://cdn.sqhk.co/lugizumevemu/dsjcKFU/zxing_barcode_scanner_android_github.pdf
    • https://cdn.sqhk.co/riwifesineji/TcjjjgT/brick_breaker_star_mod_apk_revdl.pdf
    • https://cdn.sqhk.co/vakusukereju/ifjcQgc/clash_of_clans_wikia_records.pdf
    • https://vozoduxi.weebly.com/uploads/1/3/2/8/132815828/8086463.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://muxajetolalet.epizy.com/42791223600.pdf
    • http://firuwasuwubo.epizy.com/states_of_matter_gas_worksheet.pdf
    • https://s3.amazonaws.com/robumuduluwise/league_of_legends_lux_support_guide.pdf
    • https://s3.amazonaws.com/migivewuwe/19620106878.pdf
    • https://s3.amazonaws.com/rurosaveruk/excel_2016_vlookup_multiple_sheets.pdf
    • https://s3.amazonaws.com/robumuduluwise/bhoothnath_returns_movie_full_hd.pdf
    • https://s3.amazonaws.com/mogipegi/consumables_inventory_spreadsheet.pdf
    • https://s3.amazonaws.com/wegugus/jepumimosatulagir.pdf
    • https://s3.amazonaws.com/xefejevife/are_sonic_breakfast_burritos_healthy.pdf
    • http://mijikabetabup.rf.gd/99599230795.pdf
    • http://zavivemigowoson.epizy.com/buwatezired.pdf
    • https://s3.amazonaws.com/rowubunak/xogedo.pdf
    • https://s3.amazonaws.com/tokafanawa/asccp_colposcopy_guidelines.pdf
    • http://nokemufebevezo.rf.gd/35460089671.pdf
    • http://gevorewububew.epizy.com/dodaxixikunezuguwew.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_off0000d428.bin
3b8e69430fd483be8311a4beac191c691922a9fd7a8aca36f3903a2800a16e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 5636 bytes
font_01_sfnt_off0000e72a.bin
d250a4a1392b07529f98df84d0b70147ed6cef247d07c0856151b58717752d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 10380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.