Malicious PDF — malware analysis report

Static analysis result for SHA-256 908a530c39320ac1…

MALICIOUS

PDF

75.4 KB Created: 2021-03-31 18:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ae0d2b25a992617901114bb85dbe3e4 SHA-1: ea4d1775d68c29ad77b658dda365ffc6380fd630 SHA-256: 908a530c39320ac1a38c4a9cf37c8e7bcbf27bd2fbed19633a70691a5ff2da1b
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=gangstar+vegas+apk+unlimited+money+wendgames PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5ffe849db7fe7.pdfIn PDF document text
    • https://cdn.sqhk.co/fokudiwun/hSeLjbG/sculpt_models_download.pdfIn PDF document text
    • https://nizakibete.weebly.com/uploads/1/3/4/3/134386075/zavados_bufobesu_dojagonozofag_zajazisoxovoza.pdfIn PDF document text
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/duxikezalawura_modebebopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_604984234dd6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379374/normal_60272cc35ebe2.pdfIn PDF document text
    • https://cdn.sqhk.co/bezidexa/Omvpthd/97085857962.pdfIn PDF document text
    • https://cdn.sqhk.co/pudinivil/sjihcEN/driving_school_2017_unlock_all_cars_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/ghbHTjc/nuwezewizi.pdfIn PDF document text
    • http://gezakiribonenin.mywebcommunity.org/arithmetic_operators_in_java.pdfIn PDF document text
    • https://pesowisigafu.weebly.com/uploads/1/3/0/7/130739627/96e58e0a973c6a.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/KlnhbAv/brick_out_shoot_the_ball.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/fosalizuzu/figatupisome.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/dire_maul_hunter_solo_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975d31a1-03a1-4c09-bb38-e3093f2a9bf8/lelotigomunoluguwisaja.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/58005323783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41709266-734e-4d0d-97dd-07d011ba6795/50726040701.pdfIn PDF document text
    • http://viniwowosur.onlinewebshop.net/dirk_gently_s_holistic_detective_agency_free.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_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 5628 bytes
SHA-256: 7d97af00467bcbfe1d258fd4ee3a994458da4abe4119bcca922f942f473a155e
font_01_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 11408 bytes
SHA-256: 8ce53446e24272a203e13cee8de566ea7b55d16592a193cbeb85b7e8f3e2b325

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