Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c5c8dff4e60505…

MALICIOUS

PDF

72.1 KB Created: 2021-03-28 14:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 73e95d9e724f189957974ec8e59a5086 SHA-1: 90c8894ac0c94ea343deb2033df8098d980accc3 SHA-256: 29c5c8dff4e6050518c2e497b047dfd7be88b059f9797ce8571966c62d2427cd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one suspicious URL pointing to a phishing domain. The 'PDF_SEO_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=use+geometry+%2528not+riemann+sums%2529+to+evaluate+the+following+definite+integral PDF link annotation
    • http://foodguideblog.com/weather_report_ludhiana_citytxn72.pdfIn PDF document text
    • http://teachost.com/how_to_get_oot_randomizernz2ve.pdfIn PDF document text
    • http://world-wild-shop.com/569507806347v8g9.pdfIn PDF document text
    • http://pixekabafan.iblogger.org/xfinity_x1_remote_user_guide.pdfIn PDF document text
    • http://alphabitx.com/lisuzajuneguj3e33q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_d6a322d35aef43ee8681ac9cbbdb1ecb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/fegixiwenufaduxofejubax.pdfIn PDF document text
    • http://donixug.epizy.com/pathfinder_roleplaying_game_bestiary_2.pdfIn PDF document text
    • http://butadiviwev.rf.gd/sasitavabofu.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/mebelala.pdfIn PDF document text
    • http://roworozirad.epizy.com/probability_and_statistics_for_engineers_and_scientists_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/zibisazeduzebode.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/hoover_turbo_scrub_spinscrub_50_directions.pdfIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_ad2404be62bb49b68680a54626bbe9d1.pdf?index=trueIn PDF document text
    • http://siwufevukopi.epizy.com/61128509221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a91938-c56d-4ac4-a262-8d8020e45583/hp_z420_workstation_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde82890-809b-4e75-bd21-d00d5b83bb38/zabejokoja.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/oxford_english_grammar_courseintermediate_swan_michael._walter_catherine.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/basic_electronics_book_free.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_off0000d7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 5720 bytes
SHA-256: 9aabab919f3cf14b43769942c26533b059f9459e30f569694610988d1bec186b
font_01_sfnt_off0000eb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 11676 bytes
SHA-256: fe4e9c9618c6287245ed56bcf2e58466f4b8ebb60f1a53cab8143c821459fc30

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