Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d1964a23753900…

MALICIOUS

PDF

81.5 KB Created: 2020-12-28 05:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 69ad754f27e6a69ba432e368532a4ea3 SHA-1: efc5251033bd21111562acc1ba1494f32825725f SHA-256: 74d1964a2375390060a67a1185622fad9fcd9a3409116fd6d7839b92c882ca1e
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. It contains an embedded URI pointing to 'traffking.ru', which is likely the malicious destination. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or redirection attempt.

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=functional+programming+in+scala+manning+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418968/normal_5fe3e75176b9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a5dbf3-0320-4361-ac42-b46acd1881cd/slash_girl_endless_run_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/falciform_ligament_liver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7d1f63-2d5a-41bf-9de6-a76c0f1a7c7f/32606177469.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/bluestacks_offline_installer_for_windows_7_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941bf797-f5b7-428b-a800-dad1b843992d/infection_fatality_rate_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/gabitipivovu.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/coliform_bacteria_types.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/the_circle_of_life_lyrics_and_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4560ed1-fd2f-433d-bac2-e91a7c998709/the_big_box_toni_morrison.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/robojujolidawetinamijuse.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/rachel_ruysch_fruit_and_insects_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/biorhythmus_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/46238896534.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011066.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11066 21720 bytes
SHA-256: 819fd7dca06a7eb32973f228aad1fb4291f005a75eb1c793bcaad4b24065a38d
font_00_sfnt_off0000d3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F2 5432 bytes
SHA-256: 9dc9f4fc5d890eac42ed18e0900bca43251a71412c7489c9c0afffe3a9ab453a
font_01_sfnt_off0000e657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 13172 bytes
SHA-256: ea4c5cf2f605e389cbe6a1604a1a5f8271554cfbaf94c5930ea12bca34edfbfd