Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd2ab01b20cc3dd…

MALICIOUS

PDF

81.6 KB Created: 2021-04-19 14:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c94e17ac4ef56cabdc02140a5483be68 SHA-1: 10cb706b5b34b250fa6e1792aad9cf3c849012e2 SHA-256: 1fd2ab01b20cc3dd598f7074992879900032d57f255e57ad239ef6cb6aaf53e7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to 'https://dugedepap.ru/strik?utm_term=how+often+to+eat+in+keto+diet', suggesting a phishing or content distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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=how+often+to+eat+in+keto+diet PDF link annotation
    • http://sokuxutiralibi.22web.org/rixebikugaroketeseparifod.pdfIn PDF document text
    • https://dezuximoloxesar.weebly.com/uploads/1/3/1/4/131410685/vigarod_xokepujek_tinureropagor.pdfIn PDF document text
    • https://vubomuvasof.weebly.com/uploads/1/3/1/6/131606511/dezuzinirizexitibifo.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/new_coronavirus_cases_in_san_diego_today.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/fapidivar.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/war_and_peace_movie_1966_watch.pdfIn PDF document text
    • https://pekudexuvu.weebly.com/uploads/1/3/1/4/131437333/6428439.pdfIn PDF document text
    • https://varitutetuvux.weebly.com/uploads/1/3/1/6/131607805/vetuzafabo.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/e42224.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/punurum/dulefusuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/compositions_of_transformations_worksheet_answers_9-_4.pdfIn PDF document text
    • http://kizitupavage.rf.gd/linear_algebra_practice_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/wakosutixifeke.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/83542656003.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/5864007527.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/both_ways_open_jaws.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/how_to_go_to_the_boiler_room_re2.pdfIn PDF document text
    • http://tatinovewetede.rf.gd/tc_electronic_hall_of_fame_2.pdfIn PDF document text
    • http://mabesuj.rf.gd/free_powerpoint_templates_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/bikapovufulefaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/80475839842.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/tapelemaxamarudameme.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/ctvnews_toronto_reporters.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/cardio_fitness_plan.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_off00010292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 4712 bytes
SHA-256: 3ff554139c982d2885cfbba03ce0ba9a03b5a7611055e2ff2f6e53d5029650ed
font_01_sfnt_off000112c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C4 11240 bytes
SHA-256: 13127ea598a6376d72cd73a52e0488e94af8bf9e40e95bae84be2516150544d7

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