Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc3a4c43f920c60…

MALICIOUS

PDF

82.2 KB Created: 2021-02-28 14:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5165032fd5bfddcb30165313304b6255 SHA-1: 56b3378620f52dd9e09c2ffa902926300a5db26b SHA-256: efc3a4c43f920c60b726714455ff72588c7cbc6412a508102d2256272e1fa71f
96 Risk Score

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 'fokemale.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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://fokemale.ru/wix?keyword=lindsey+nelson+wife PDF link annotation
    • https://cdn.sqhk.co/nodujugebi/icKdjfL/xfinity_stream_beta_not_working_on_samsung_tv.pdfIn PDF document text
    • http://reduslim-shopofficial.site/80478186032vc1p9.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/gghigw2/bubble_shooter_2_app.pdfIn PDF document text
    • http://price-list.moscow/fifo_roster_app_freefmrrr.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/iAhjjcW/miziwup.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/kO9bgc5/covent_garden_market_directions.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/hcYhiif/diamond_sharpening_steel_for_knives.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/nCGjdja/taps_to_riches_mod_apk_download.pdfIn PDF document text
    • http://autokenn.com/interpreting_graphs_accelerated_motion_worksheet_answersxtlo0.pdfIn PDF document text
    • http://xploitcrew.io/siwirauc71a.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/jeponowon/delete_bloatware_apps_android.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/simple_punctuation_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/teatv_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/zosunewum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 4732 bytes
SHA-256: 27b94cad23c7c82da46d61a7cebc0bfa9feb46f1004ef2dd803d9090d30b3501
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10936 bytes
SHA-256: 250dbca029194276707aca2657ef9b14709883cd71896a42b91edc934d8b32d5
font_02_sfnt_off000125df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 16384 bytes
SHA-256: a8f82ce1cdc57d6cf73caeb35ba0a534b8f114798d4dfc5d6ed82df03316e49d

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