Malicious PDF — malware analysis report

Static analysis result for SHA-256 8961270f1e7ef50a…

MALICIOUS

PDF

72.7 KB Created: 2021-01-26 11:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 45e4dcaff5570eda78f0f8690298c0d8 SHA-1: a4070592ac479d911063e618b862fabec744eaff SHA-256: 8961270f1e7ef50a18a12afebfc960fe5e7df9f847fcec2d0297e98b36895037
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Carsguide dealer login' and the wkhtmltopdf application, suggesting a phishing lure. Several extracted URLs, including 'http://setofexperience.site/rajefumimakortrsu.pdf', are associated with malicious activity and likely serve as part of the attack chain for delivering further payloads or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/aws?utm_term=carsguide+dealer+login PDF link annotation
    • http://setofexperience.site/rajefumimakortrsu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416921/normal_5fc8828d3950e.pdfIn PDF document text
    • http://albatros-trans.ru/fruits_and_vegetables_having_vitamin_dwbhm3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476135/normal_6005156801bfa.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/hdiaWha/business_insider_stock_market_crash_expert_sees_depression.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/dlhbXii/33036983984.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/cW5jfmk/wild_crocodile_simulator_3d.pdfIn PDF document text
    • http://gratoraama.website/653440145054obs0.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/eqegjDV/tagumigegines.pdfIn PDF document text
    • http://xsafak.com/alpha_squadron_2_apkocr8l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_600dfae7ee109.pdfIn PDF document text
    • http://vivadoctor.ru/46416791500ogngq.pdfIn PDF document text
    • http://socialwave.me/nasa_spacex_crew_dragon_astronauts_2020jictt.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/pgfduhe/74455773467.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/fadupazageraf/excel_lookup_several_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/jebase.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/36136158523.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/wegiradul.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/2207552794.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/centrelink_contact_number_reporting_line.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/alvida_na_kehna_video_song.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_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 4896 bytes
SHA-256: 7fb1d726427f441f041b33a8bed09aaabbf47ec57502282741a92807507a91f0
font_01_sfnt_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 11460 bytes
SHA-256: 4ca5bf7cce36d4b4bd6a61093ef7a9f439786059cfc500d6392a4e0f672192c7

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