Malicious PDF — malware analysis report

Static analysis result for SHA-256 610bb2243cb99ac9…

MALICIOUS

PDF

70.5 KB Created: 2021-05-04 05:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7e4d990d52342c100e69c3ac4d411d7f SHA-1: 5758667c6326cd0291af47b7deface3c9ba5f914 SHA-256: 610bb2243cb99ac9f03a3f8e94df29bfae57db8fb18b22c0b22436a3e8a29721
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and exhibits characteristics of a link farm, with numerous external URLs. One prominent URL, 'https://botokaw.ru/strik?utm_term=when+you+meet+someone+just+like+you+quotes', appears to be the primary lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=when+you+meet+someone+just+like+you+quotes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406213/normal_6006d01aed913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_6049318597ede.pdfIn PDF document text
    • http://pakamid.22web.org/prentice_hall_biology_textbook_answer_key.pdfIn PDF document text
    • http://makululi.iblogger.org/samsung_blu_ray_bd_f5700_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_6065b68e3bb12.pdfIn PDF document text
    • http://jizefuli.22web.org/vasusepuk.pdfIn PDF document text
    • http://fajiragudabega.iblogger.org/16840064847.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/bagisi/pobesudoboma.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/navien_npe-240a_maintenance_kit.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_300a60d7770948b1b9c93e3cb70f5e72.pdf?index=trueIn PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_c60c154ce55546ad976ef5e0ce9ceb68.pdf?index=trueIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_7c8b611dba77441ca387186fd98466b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xezonijida/mi_air_purifier_not_working.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_2c4dc2196777490e82da989e9574e235.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setikizo/les_miserables_broadway_2014_cast_recording.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/91889573568.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_335a14f5a2184631a5366dfaa6d237ae.pdf?index=trueIn PDF document text
    • http://dakezemafatelo.epizy.com/33329950691.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/nebofepotikunobutuzud.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/janizakuzeven.pdfIn PDF document text
    • http://poxemibusap.epizy.com/contaminacion_atmosferica_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/free_metaphor_and_simile_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/kinezoxinakamilipivijeme.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/hunter_commercial_irrigation_controller_manual.pdfIn PDF document text
    • http://pamonaporusobi.epizy.com/how_to_disconnect_a_badger_5_garbage_disposal.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_off0000d959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD959 5000 bytes
SHA-256: 09e4e231987ac3e1cb06dd444430494c3015e5f89aec4e868580553bd1a88c67
font_01_sfnt_off0000ea55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 10020 bytes
SHA-256: 0cfe09cba5f018f70374868c636397df3119c9a0e00f89d1d9e0383435044e56

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