Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e4cf14fdfc9e5c…

MALICIOUS

PDF

81.9 KB Created: 2021-04-01 14:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 35ff0fb71c2520e0ebbd2c2b3f1bfcda SHA-1: f0f3e550215a045c150f827008ae430e86c1fe6e SHA-256: 19e4cf14fdfc9e5c6478827182dc48749be1ecf0e2e50f676fe6b729a17cde5b
246 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand impersonation for credential phishing and a link farm. The ML classifier also assigned a high probability of maliciousness. The document contains numerous external links, many hosted on disposable domains, suggesting a phishing or spam campaign. No scripts were extracted, but the presence of external links and the phishing lure indicate a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/2743491.pdf.
  • 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+show+interface+description+cisco PDF link annotation
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/2743491.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/xiepWib/9523682320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_605ba0c2b4de0.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/8TggQij/vegizipav.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/ggpBhf8/microsoft_teams_download_attendance_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_604d137206e51.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/sight_words_sentences.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/bgjdlgh/mixuvebenolemu.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/aiekABE/dreamline_elegance_shower_door_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/gibSDIY/guitar_sounds_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_60651e4b88a2e.pdfIn PDF document text
    • https://konevumi.weebly.com/uploads/1/3/4/3/134399330/5578d5b57f5039.pdfIn PDF document text
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/cd0ae7.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/povomin.pdfIn PDF document text
    • https://cdn.sqhk.co/lawipavoso/GjjibgN/bad_piggies_3_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_604368a7dbd7f.pdfIn PDF document text
    • https://kidepexabosu.weebly.com/uploads/1/3/4/2/134266059/5085900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_6010f97fa627e.pdfIn PDF document text
    • https://cdn.sqhk.co/tirewaku/Yhgjjii/pinata_hunter_3_unblocked_games_77.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/ibgjIjd/mejoz.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/outlook_365_won_t_open.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/ggjfajg/strikers_1945_2_ps1.pdfIn PDF document text
    • http://birixuxewazotaz.mywebcommunity.org/australian_open_2020_draw_printable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukilaba.myartsonline.com/how_to_adjust_bipap_settings.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/28063312229.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_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 5264 bytes
SHA-256: 592bc7f466ba9da716282fda62d9542d0e1a2a24fcafec09981c0dee3002a40a
font_01_sfnt_off00011486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11486 10852 bytes
SHA-256: 8f2a86b89b3b8aa42e95d2be9a205da73e233aecb331704e1f605aaa6bc5622d