Malicious PDF — malware analysis report

Static analysis result for SHA-256 399486b1bef0d03c…

MALICIOUS

PDF

70.7 KB Created: 2020-11-18 15:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f56a6948b1238b0cd1b0d92ae24468b2 SHA-1: 5570a9a2893e5cf5ff1bcd030d089c9a693a967c SHA-256: 399486b1bef0d03c751e0ba87c96c0bc8afff90bbc7227e394dfca13868bec74
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru', which is likely part of the malicious payload delivery. While no scripts were directly extracted, the PDF structure and the nature of the embedded URI suggest an attempt to trick the user into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=comic+book+reader+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427079/normal_5fa18aa95f799.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/tadovu/free_to_ms_word_converter_download.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/bernoulli_differential_equation_problems_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/purpose_driven_life_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca6c0c8-4e92-4ba5-a8a8-c578d77ff381/19002844499.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/notudaxagesikanode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be42d19-8959-4030-9c5b-a9fba14473c2/wopanilike.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/garimexajojes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef05d70-e6e6-47a9-95e3-451a6266f55b/wekiguriwiletoxepub.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/gusomanovezufabev.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/barney_the_dinosaur_videos_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6c2c06-22a3-4bdc-9860-071fab8d814d/jejimixatufakaramuzel.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/durham_county_nc_arrest_photos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c54b76-3aa0-4a71-a671-d22b6fe00fd0/duroziwidabekamudakukuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070510dd-85b7-4730-9944-0c1bb81c99fb/hamilton_beach_31126_manual.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_off0000d856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD856 5200 bytes
SHA-256: 8093fdf664d8a4c3a506993a7bac707b71a6c208bcb32a426f1989b842a9d9cd
font_01_sfnt_off0000e9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F2 10612 bytes
SHA-256: 2c90bffa1ef21c449320ab5b99ccd8ed9381edfd10601ab0a0b5d360f00e9427

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