Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d7684a2a058849…

MALICIOUS

PDF

79.3 KB Created: 2021-03-11 04:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bdea3dcb5fb79880cf37237938cbf03 SHA-1: 68e5e55e3ae4c2af00fa6c81e51e9e7f71690f0f SHA-256: 18d7684a2a0588494299353313e443c35363b36df0a57dbc91f8d043624c320f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains references to 'Bergey's manual' and 'wkhtmltopdf', suggesting a lure to download a specific PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/wix?keyword=bergey%2527s+manual+of+determinative+bacteriology+9th+pdf
    • https://cdn.sqhk.co/rabataxuvax/lbhhoIR/zifarilatake.pdf
    • https://cdn.sqhk.co/fasazani/fAPLPgh/88319086943.pdf
    • http://finoginujowiwi.mypressonline.com/mtd_yard_machine_snow_blower_attachment.pdf
    • https://cdn.sqhk.co/loboremetoxe/ighhdja/pexusapu.pdf
    • http://gazajujana.mygamesonline.org/punk_rock_changed_our_lives.pdf
    • http://tifoxikutawe.sportsontheweb.net/sherlock_holmes_2_full_hindi_dubbed_movie_download_300mb.pdf
    • https://cdn.sqhk.co/pixukinoma/icchejh/injustice_gods_among_us_ultimate_edition_ps4_reviews.pdf
    • https://cdn.sqhk.co/bozutebux/iciieFK/download_race_formula_nations_mod_apk.pdf
    • http://golivexi.22web.org/12321650297.pdf
    • http://ravigimojamel.mypressonline.com/fumuneleledenakuxif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xutewedosobu.rf.gd/52873341940.pdf
    • https://s3.amazonaws.com/tesodagiwor/mailing_label_template_online.pdf
    • http://relurifiluxel.epizy.com/diablo_iii_classes_ranked.pdf
    • https://s3.amazonaws.com/rokuwapesu/petulelakajo.pdf
    • http://vunanazon.rf.gd/liftmaster_877max_manual.pdf
    • http://tiruweditivunaw.myartsonline.com/what_p90x_schedule_should_i_do.pdf
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_a3d7a6715a8848b79afec79f0e239921.pdf?index=true
    • https://s3.amazonaws.com/gazitif/7794223674.pdf
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_1aff4ccbd6904b55abeb7619baac3f70.pdf?index=true
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_b284b04a2f8c462e8b3d9050a271c681.pdf?index=true
    • https://s3.amazonaws.com/jafujasiwetid/70456370586.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/easy_worship_background_videos_free.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e205.bin
d9371d0fba336475ebee14c5046d1413111a20d28217d73003f7e9c79ff911b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 6112 bytes
font_01_sfnt_off0000f6b9.bin
12a1c0701833648f39d37f7269bbc15deee72c1364d384b9292e8c6434411ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 10280 bytes
font_02_sfnt_off00011a26.bin
e062faff0b5f3d12ef96d17a813e209689a07cec8984531399442ab350abe39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A26 16136 bytes

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