Malicious PDF — malware analysis report

Static analysis result for SHA-256 739d25316e9b4470…

MALICIOUS

PDF

68.9 KB Created: 2020-12-24 13:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e9c506a7a41bd726bf6af80c048a89d4 SHA-1: bf65513b60ec5fcbe64bf9ac9427d006bbd782a1 SHA-256: 739d25316e9b447074e4dee6c68fab1a8e598f99ca5f5e8442b2f8c8cea76631
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=followers+followers+analytics+for+instagram+pro+apk'. This URL is presented in a context that suggests a phishing or scam attempt, likely to trick users into downloading malware or divulging information. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=followers+followers+analytics+for+instagram+pro+apk In PDF document text
    • https://cdn.sqhk.co/waximanodif/Uidhdgi/electron_configuration_of_sulfur_in_sf2.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/ghosCjh/flipper_3d_pinball_space_cadet_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_5fc6daf3b8e3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_5fcc6126aa3da.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/SghdPK1/61950627069.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pirofopafu/ferienplan_baden_wrttemberg_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/hotspot_shield_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/development_finance_international_and_oxfam_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/crazy_frog_1_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/62216056687.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/burning_man_weather_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/5930314737.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/what_is_my_bfe_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/accident_manual_southern_railway.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/movies_counter_marathi_movie_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/pisuwerodorutifotife.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB048 5336 bytes
SHA-256: c2a743e54396210bbfd0a3e86b8c4dd0167358200ce022456a9285d2d04226ca
font_01_sfnt_off0000c272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC272 9616 bytes
SHA-256: 6f37f224718877585fa17438341ff9858ea72416f39d12b8aa22806fbafff495
font_02_sfnt_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 16060 bytes
SHA-256: 9620b43043e49e5cdfc4c7028495a09b45eb86b5b2416938c5e26316e673ef0f
font_03_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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