Malicious PDF — malware analysis report

Static analysis result for SHA-256 97340f1897f0eeb5…

MALICIOUS

PDF

78.2 KB Created: 2021-04-30 22:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7429e14d8d3d2b5cda9b9cc55d8e8c SHA-1: 9bbd14925aa409a93fed4954bee2d9bb6c109502 SHA-256: 97340f1897f0eeb569b203dc4c182fac7b7f4def6535950b23cb2250c34823b7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains a large number of external links, with one heuristic specifically flagging it as a 'PDF_SEO_LINK_FARM'. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dafemum.ru/strik?utm_term=what+is+a+diversity+statement+examples
    • http://wejafopag.mypressonline.com/pdf_file_editor_apk_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5fcee8de14e1a.pdf
    • https://cdn-cms.f-static.net/uploads/4401714/normal_602470e00ee9a.pdf
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/binewanefuwulak-zitolofetajini.pdf
    • http://zonitupupafof.sportsontheweb.net/kingdom_management_games_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fc89cbc11054.pdf
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5ffda2efc5642.pdf
    • http://gigojosok.22web.org/apache_avro_format.pdf
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/44c201a0c.pdf
    • http://toteganutiv.66ghz.com/44503255934.pdf
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/vusoge_miviladivaje_nidezotogesi.pdf
    • https://cdn-cms.f-static.net/uploads/4380701/normal_6014b9fef0f66.pdf
    • https://cdn-cms.f-static.net/uploads/4392237/normal_600c8e6d0f2a5.pdf
    • https://static.s123-cdn-static.com/uploads/4411220/normal_5fe061da84cdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_d9d21daaaca74dc1a5c62c3b58701fda.pdf?index=true
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_fed9994812824ba4a7554a56c858b232.pdf?index=true
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_60d2a0c1c6c1489f961f331f60254296.pdf?index=true
    • http://samajusinifako.atwebpages.com/vehicle_bill_of_sale_template_fillable_free.pdf
    • http://fozilido.epizy.com/ruger_mini_14_tactical_owners_manual.pdf
    • http://kazaxese.epizy.com/zilubeleged.pdf
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_ca596fa223874d528dfd4b9e20318a31.pdf?index=true
    • http://jefiferinazubim.atwebpages.com/8774293635.pdf
    • http://xidatozekef.epizy.com/47745682710.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_off0000f42b.bin
7facaa93aa4b6ad37300afe6b44acd57605efad2bec5806e4b81628418cdbb22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 5440 bytes
font_01_sfnt_off00010698.bin
53809f03455551bd7fe38f44c8d0d46ee37a35d0bd580937cc0a89be11f065c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 10644 bytes

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