Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99b639d599e82ab…

MALICIOUS

PDF

75.9 KB Created: 2021-04-24 18:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5aaaf4e243fb2b373e9ee72724202efe SHA-1: 7874b42d1c4e9f22fed6e60d55aca4927bc43ace SHA-256: a99b639d599e82ab255377395bb5bb53aa4a726698892841491df478304c90f1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL points to a domain that appears to be hosting a phishing lure related to Cisco CCNA certification. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=cisco+ccna+200-301+cert+guide PDF link annotation
    • http://swiss-gear.store/77231428202itpiq.pdfIn PDF document text
    • http://zatorigixoluji.iblogger.org/charitable_contributions_request_form.pdfIn PDF document text
    • http://goodshopsales.xyz/sesonedapwih0.pdfIn PDF document text
    • http://vittorguxx.site/79205790446lj18m.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/riwusi.pdfIn PDF document text
    • http://cashbackmoney.info/premiere_pro_equivalent_free9qe8j.pdfIn PDF document text
    • https://zideloxilatomi.weebly.com/uploads/1/3/5/3/135325243/7329338.pdfIn PDF document text
    • http://fegalaro.iblogger.org/canon_g7x_mark_ii_manual.pdfIn PDF document text
    • http://soruboseveli.iblogger.org/l_orthographe_lexicale_et_grammaticale.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/tumasun/buildcraft_1._6_4.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/ipod_nano_generation_7_screen_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab89a7a-a4e4-4cac-9c23-8f0f626f21dc/3001759380.pdfIn PDF document text
    • http://vevemelimo.epizy.com/malayalam_cherukatha.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/97661268480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7a4999-4903-43f3-a44a-d7aee86c8632/zukevugewowanegenoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab338f2d-1593-4a96-b27f-c254bc92bd1b/which_of_the_following_would_reduce_adverse_impact_on_your_credit_score.pdfIn PDF document text
    • http://posijibanif.epizy.com/53040362902.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/rstudio_3._5._2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d8238d-8ac8-4bf2-bc4f-f0ff0bbae6ce/jack_and_the_beanstalk_short_story_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55bbb9da-591f-4f76-bd6f-dae05db6bec0/small_engine_repair_near_me_honda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e46944-9ae0-4abf-8eda-8280ce5b5a10/11153323860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76afefdb-4007-48d2-8922-7894c9cca15d/68569200280.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/xefufodiberofifexobajode.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_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 5504 bytes
SHA-256: c67524a0bd103d4d5416fab08ea2fffbc253c0954836b2870f4a69760ac376dc
font_01_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 10732 bytes
SHA-256: 43f9ab0e4f00557a4f7cdff746a725ce9ae698f63437786dffb7527d8c10db25

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