Malicious PDF — malware analysis report

Static analysis result for SHA-256 644c794bb6eaced9…

MALICIOUS

PDF

109.9 KB Created: 2021-03-17 19:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6d38fe271db87d0128477424397a6399 SHA-1: 0f6a2c427812d7e9885fb8a962b921ba75c74701 SHA-256: 644c794bb6eaced9459ee5d15efaac42dcc55c06c789686daeb5ba6640d820e0
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are obfuscated or lead to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body, though partially corrupted, suggests a lure related to 'personal statement for uni examples', likely to direct users to phishing or malware distribution sites. No scripts were extracted, but the extensive link farm and ClamAV detection point towards a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=how+to+write+a+personal+statement+for+uni+examples PDF link annotation
    • https://cdn.sqhk.co/noligigibar/giBhbZD/police_car_chase_san_diego.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/idwaZgj/riptide_gp2_mod_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/hhYfagj/earth_wind_and_fire_devotion_live.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/gtFHjeA/fefofit.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/gggfPAX/50773349119.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/ghhdjig/27304120697.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumabigige/7hbgjgc/46465479493.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/erjqiaP/77918340934.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/Hjfgghi/sdg_game_mdf.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/X2yjbic/klwp_live_wallpaper_maker_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fakozunada/i3hcpIE/magic_war_of_the_spark_planeswalkers.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/dYniejj/6275001400.pdfIn PDF document text
    • https://cdn.sqhk.co/milufofez/hgdSXic/green_bay_press_gazette_contact_information.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/gt7jjSR/85415444892.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/XjhhiTG/27826853845.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/kokesatodixon/close_up_pics_level_41_answers.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_8f5c0f2b65444e44b40cc0da0af0823b.pdf?index=trueIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_c01e6fd8bc9f45759775cf8c6c4370a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/yantam_marathi_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/epson_xp-820_ink_cartridge_not_recognized.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_46c5beae736841d0b7c373294f3114fc.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_3ed4085ab2e34bd0af1b525b10b763a9.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_1581b3ee13ae40e6816f611a7431b5b8.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170C1 5168 bytes
SHA-256: 6fbb1ed3407e777b0c7bf88597e23d906882603b80fd441e3a1d8050c27457c0
font_01_sfnt_off00018253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18253 11204 bytes
SHA-256: 7f5ee9f64f1486a1dfa46ef17d4687f52b8e31fdfa95659be76aa9ac1e042dcf

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