Malicious PDF — malware analysis report

Static analysis result for SHA-256 90965b7efe9d46d5…

MALICIOUS

PDF

79.4 KB Created: 2021-03-14 05:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918dbcd1af6361e99ff83ffbd98ac919 SHA-1: 74a6ca8cbb596eb6c3ce7385134747973e3f617d SHA-256: 90965b7efe9d46d55f37ed2cebc1831e2e1ec550c25906d2135325384b695677
104 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs and a heuristic for a download button suggests a phishing or social engineering attack. The document body, though heavily obfuscated, contains references to 'apk new version download', reinforcing the lure for a malicious download.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=a+wife+and+mother+apk+new+version+download
    • http://suziterunedoloj.sportsontheweb.net/banukezigowar.pdf
    • http://healthytrands.com/appion_g5twin_refrigerant_recovery_machine_partsuvkak.pdf
    • http://select-get.top/dojupikevuzosaxuxpj62.pdf
    • http://sesesuruko.mypressonline.com/giganuw.pdf
    • http://dorightschool.com/awge_dvd_30kvlp.pdf
    • http://gravkamen.ru/33381612749y5q9k.pdf
    • http://hangookoil.ru/kazapbpu44.pdf
    • http://tugrull.com/pitowadasagarixofafufila7wisr.pdf
    • http://8gusevshop.space/poweraudio_pro_music_player_reviewi2ktk.pdf
    • http://xulubapatoso.scienceontheweb.net/lowrance_hook_3x_dsi_review.pdf
    • http://yyyyyyhhhhh.space/lowagenisaxiios0p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eed149f0-b514-4842-9493-b3cffb97a9a4/the_2nd_edition_of_bergeys_manual_of_systematic_bacteriology_is_largely_based_on_classification.pdf
    • https://s3.amazonaws.com/ragejufa/balancing_equations_rules.pdf
    • https://s3.amazonaws.com/tomamujuf/nibesavajezu.pdf
    • https://uploads.strikinglycdn.com/files/cc53aded-7ebd-4483-b053-887d77bb3af0/15227026005.pdf
    • https://s3.amazonaws.com/xixonu/37274163643.pdf
    • https://s3.amazonaws.com/jijumupade/lukirejeliwe.pdf
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_1c0bf2ed6fa74bb5bb18b4916530a8f1.pdf?index=true
    • https://s3.amazonaws.com/midaguvimabof/starbucks_cold_brew_coffee_sizes.pdf
    • https://uploads.strikinglycdn.com/files/9e57d856-e6f0-4c6a-8946-e0bfd94e76ff/black_and_decker_leaf_hog_bv4000_type_2.pdf
    • https://bed2d873-735b-46bb-a8a3-264d0455df4e.filesusr.com/ugd/03ede2_cb23ba4ece1a425db5267500278de66b.pdf?index=true
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_b58360218e364d45889374d174a4135b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd5.bin
702d5d613a119162f25461f8f4d8a156bfb628cb970e7f08f9fb54c4584b5894		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 4652 bytes
font_01_sfnt_off0000ed23.bin
0a8ad4de15b10afedab38480078e4ca5c55bd7d0c8e76eabcc38e0bd24591344		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 5488 bytes
font_02_sfnt_off0000ffb4.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 1800 bytes
font_03_sfnt_off00010842.bin
e73684473bac3c983ae9cacb9099e2d91d50ce9b35a523939c6d7dc84c88ab30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 11448 bytes

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