Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ceccdddbe76e2e5…

MALICIOUS

PDF

125.7 KB Created: 2021-04-10 18:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2ed38ff0cfc24e3b58579a7fa4c56c6a SHA-1: 12e6c34c757f256a955d10bb4fc3614026813294 SHA-256: 7ceccdddbe76e2e501990a59aab14f3e8396212e65df9a6081a3b14e376051c7
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics and ML classifiers as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://resalured.ru/strik?utm_term=who+is+light+in+death+note PDF link annotation
    • http://pankreatitum.ru/70111313908nv2c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_6042da805a0b8.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/add_text_to_adobe_reader_x.pdfIn PDF document text
    • http://cenderaoriginator.com/fotenago0ulke.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/kurevawegugul.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/temperamentos_transformados_download_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443578/normal_60337c5d39cbc.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/krishna_bhajan_lyrics_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fe357ac4563b.pdfIn PDF document text
    • http://iclod.tech/jorodinasusogobafexbrga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_601b9bfa751b3.pdfIn PDF document text
    • http://mojipasi.22web.org/golds_gym_450_treadmill_walmart.pdfIn PDF document text
    • http://zolomakowifop.iblogger.org/tipevuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivebiza.epizy.com/fojakebepawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bc9f4f-1253-46e1-b699-cf9145aac93e/how_tall_is_hugo_weaving_in_feet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec66474-4ca9-4325-bb82-843b4b8d0546/peduxoleverepu.pdfIn PDF document text
    • http://rufegojokod.epizy.com/best_volume_booster_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb3efef-d171-46ef-bee2-a2d955117e21/how_to_reset_a_mitsubishi_tv.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/wazaxajefetomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cf7114-f3ff-49ee-ad21-e86ebb587a54/how_to_fix_samsung_led_tv_vertical_lines.pdfIn PDF document text
    • http://maderenefozido.rf.gd/memozuxaxoguboxaga.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001840d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1840D 12964 bytes
SHA-256: 3b9b9a25171a612fe872e16f0298bbcca97b41696b3b171dfd19e86cee04c847
font_01_sfnt_off0001add4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADD4 5004 bytes
SHA-256: e6f4002dc0e8b9c3e68e497f0ea3468c96d93ff62a2d2ee25c64c8d21425f864
font_02_sfnt_off0001bee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEE5 13368 bytes
SHA-256: a630d6ef11a9921b9b4ddce1b62fc3766f7aab3547579d84164c225caa51865d