Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64fa92e495adeff…

MALICIOUS

PDF

190.1 KB Created: 2021-04-09 03:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1dc23d143635ff7783bfaff04990bd90 SHA-1: 9c3494990b364fc54152b691efaa2780dee31476 SHA-256: c64fa92e495adeffc2cf64085b1d15ba130c42f203a70604e0cb3bc4a2027610
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The presence of these URLs suggests the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9483

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=how+to+practice+wing+chun+at+home PDF link annotation
    • http://pimunipimikuvaj.iblogger.org/nodivudufo.pdfIn PDF document text
    • http://gomededow.22web.org/23598485109.pdfIn PDF document text
    • http://katowad.22web.org/cerebral_palsy_idai.pdfIn PDF document text
    • http://pasozabijegigus.iblogger.org/nevonuwobisikajefo.pdfIn PDF document text
    • http://ruzoboxilotazex.22web.org/sakhi_songs_naa_songs_telugu.pdfIn PDF document text
    • http://jurogiriwizezaw.22web.org/biodata_sample_download.pdfIn PDF document text
    • http://mareson.getenjoyment.net/bupoxeruxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_1b4807d3cdc344ebb50b917b4b681c28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legenapi/will_my_samsung_tv_have_disney_plus.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_308f7f6c09284c648bc3117d1195f98e.pdf?index=trueIn PDF document text
    • http://xetorofowuwid.epizy.com/amicorum_spectaculum_presents_theatre_formidable.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/tiger_quotes_life_of_pi.pdfIn PDF document text
    • http://budezeja.rf.gd/employment_news_2020.pdfIn PDF document text
    • http://mowekejerejo.rf.gd/54810399032.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_7e055956a4ed4c90a15761b12146fbed.pdf?index=trueIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_adf17d83ffef4deb9ca484231ff76d0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejeseja/chikni_chameli_song_webmusic.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/publisher_template_infographic.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_f4a7e586a2c34f5387ce36628d4ff4af.pdf?index=trueIn PDF document text
    • http://rinexijirava.rf.gd/45010797033.pdfIn PDF document text
    • http://ginisanekuxowo.epizy.com/logitech_gamepad_f710_mac_os_x.pdfIn PDF document text
    • http://pazutoxun.epizy.com/tidegerobutenawojotitored.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/54856441943.pdfIn PDF document text
    • http://rinejifivazori.epizy.com/93440929606.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/zukipinekifeki.pdfIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/ethernet_cable_color_code.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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26135 3636 bytes
SHA-256: 913a6d36bd51829aa49e220c1f4a6f4882f2ab4ef4554aa2057561abe31e2fe7
font_01_sfnt_off00026dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26DFF 5192 bytes
SHA-256: 0b5138eb6385c155abd357ea37360a5469e4e98a043944c96b602ac199f9d653
font_02_sfnt_off00027f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F88 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off00028815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28815 14124 bytes
SHA-256: 10749a84355d6cc5e69dd765cb5039d9d3613c76ca40d5f4a55d8a076d8215b6
font_04_sfnt_off0002b637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B637 16344 bytes
SHA-256: 1b9a7ad9542b5724a9697ba9afe5b105e845a60827d4f916e62206c6bae2ec1f
font_05_sfnt_off0002cc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC0F 9864 bytes
SHA-256: b22efcf265e499d84f60ea2d28b4e115969b2420897bc25adae185f722848b85

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