Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d790e56900fa3e2…

MALICIOUS

PDF

107.6 KB Created: 2021-03-01 21:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c167c8193b21f42d75074b64aa62e3 SHA-1: 24b7e845460a6069065cd04c1d5ade39a6971dd1 SHA-256: 0d790e56900fa3e2d7bf699f5482fd5bf9a63b40695c1bea034cf14f86f96666
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=can+you+wear+navy+uniform+off+duty', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes 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://golowaki.ru/123?utm_term=can+you+wear+navy+uniform+off+duty
    • http://milky-rp.space/guided_reading_levels_per_gradeo8815.pdf
    • https://cdn.sqhk.co/dilizilozok/aY8jdUp/zanojurijuxutetobivut.pdf
    • https://cdn.sqhk.co/ponajadu/gurZRlt/download_death_worm_free_mod.pdf
    • http://arm-watch1.club/android_linux_kernel_development_tutorial4k5c6.pdf
    • http://fomigiv.mypressonline.com/everlasting_god_piano_chords_william_murphy.pdf
    • http://covidcapsule.world/famalamekurinaranarawevgvl2g.pdf
    • http://sozimaxetupow.mywebcommunity.org/nojujedexoligasarig.pdf
    • https://cdn.sqhk.co/difanemifal/SjdUhhM/10129678468.pdf
    • https://cdn.sqhk.co/papowepu/gcEiauS/87299139091.pdf
    • http://vorusobowa.66ghz.com/4672284821.pdf
    • http://busibear.com/42472555647ilodr.pdf
    • https://cdn.sqhk.co/mewowoji/jdLNbji/81527997304.pdf
    • http://rexonina.medianewsonline.com/how_many_books_in_walking_dead_series.pdf
    • http://nabavawuzafurur.mygamesonline.org/attack_on_titan_all_characters_season_4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://powipuwefitori.rf.gd/shutterstock_vector_file_format.pdf
    • http://vilobeve.rf.gd/nopitinedukonulozepojif.pdf
    • http://vimixof.onlinewebshop.net/domufi.pdf
    • http://xemubekimivimed.epizy.com/cydia_app_admin.pdf
    • https://s3.amazonaws.com/xuzed/atmosfearfx_sinister_shadows.pdf
    • http://xuvekixofeku.onlinewebshop.net/20518585349.pdf
    • http://xurosuforudev.atwebpages.com/what_type_of_wood_chips_to_use_in_masterbuilt_electric_smoker.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016928.bin
baafa33d592697f2a284c5e2f71eb7302fa38ca4c33701ae94dcee79f0f170eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x16928 5000 bytes
font_01_sfnt_off00017a34.bin
4804e285b50ee5d11bd620df44cbbe7ba732bca5b434a0ad1114daee75f93f13
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A34 11440 bytes