Malicious PDF — malware analysis report

Static analysis result for SHA-256 1076e6e1dce2f567…

MALICIOUS

PDF

133.0 KB Created: 2021-03-16 10:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f7d8d91dcfa47371ed8ddffda8bae00b SHA-1: 1481be20707dcf00aee119d9fdc066b131df68b2 SHA-256: 1076e6e1dce2f567934cc18023b01a4d0a992362a2cf57817c4efbdd45493124
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, but no clear instructions or lures are discernible from the readable portions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=the+girl+with+the+dragon+tattoo+movie+plot+summary PDF link annotation
    • http://guketaz.iblogger.org/25950299147.pdfIn PDF document text
    • http://freedate18.xyz/jude_the_obscure_quotesswphi.pdfIn PDF document text
    • http://nidupokezol.iblogger.org/tuxeviruwefukiwop.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/how_to_connect_black_and_decker_battery_charger.pdfIn PDF document text
    • http://fitness-ital.fun/19492820609ztlqm.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/ghhDZQJ/guns_mod_for_minecraft_apk_download.pdfIn PDF document text
    • http://callipakk2.site/dragon_ball_z_dokkan_battle_jp_apk_download_iosywpap.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/t8iifUQ/kavonixi.pdfIn PDF document text
    • http://idealica-ufficiale.site/98909014803ilk2l.pdfIn PDF document text
    • http://ontrade.top/37510436416p2zfz.pdfIn PDF document text
    • http://mebel-albero.ru/guzivaxapinolewozujobam0tnp.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/mofoledolodi.pdfIn PDF document text
    • http://dafesoxexigu.medianewsonline.com/toyota_camry_se_2019_invoice_price.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/lg_lfx31925st_ice_maker_removallhcpe.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/ibps_gramin_bank_recruitment_2020.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/free_download_general_english_aptitude_questions_with_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavisekenesavof.myartsonline.com/fopajid.pdfIn PDF document text
    • http://gometupibi.rf.gd/dell_optiplex_3010_tower_i5-3470.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/dodipovivaj.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/62467308560.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C703 5576 bytes
SHA-256: 0aabdc88e6538048cad37324d51883c5624b8449acf76c0ec067b7a458d4b0ad
font_01_sfnt_off0001d9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9EC 14128 bytes
SHA-256: 58489e081a69d3a063730d0e8bbdd08533cd39394210bee5864ab40fc8e3541d

Open this report in the interactive analyzer, or submit your own file for analysis.