Malicious PDF — malware analysis report

Static analysis result for SHA-256 013bce4c11c8ec2c…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 16:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bf00ded3f9820e4dc67eee566939d9fe SHA-1: 6f4d73daadb0c24cd39e82bbb2c7a703009e0255 SHA-256: 013bce4c11c8ec2c1175624b521bb811f63290010feeb21bc64f1e7f268a7ee8
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a reference to 'cartoon tamil dubbed movies' and the authoring application 'wkhtmltopdf', indicating a potential lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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/123?utm_term=cartoon+tamil+dubbed+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489734/normal_60608c2756d69.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/6hgKhjz/26778789611.pdfIn PDF document text
    • http://zumekina.22web.org/rubigewi.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/hibhghh/19146561681.pdfIn PDF document text
    • http://steblin.pro/ebmt_poster_guidelinesprtkt.pdfIn PDF document text
    • http://ledojekukifal.iblogger.org/48699082446.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/dhjjibx/criminal_files_investigation_special_squads.pdfIn PDF document text
    • http://vujabix.22web.org/commercial_mathematics_formulas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fd8068480987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_600a58490a37c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388815/normal_5ff5a3c2ea6fa.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/un_metro_cubico_cuantos_cm_cubicos_tiene713lj.pdfIn PDF document text
    • http://uscreditinquiry.info/32750864661i32ex.pdfIn PDF document text
    • http://milanomoda-italy.site/ktm_1290_adventure_service_manual3kudy.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/zjj0Jig/can_i_use_chalk_paint_over_varnish.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/Lhq7Ajb/puppy_wallpaper_4k_hd_iphone.pdfIn PDF document text
    • http://pomurofame.iblogger.org/ro_m_alchemist_homunculus_guide.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/52348612484pbuuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovevane.epizy.com/peavey_vypyr_vip_3_bass_review.pdfIn PDF document text
    • http://finosumu.rf.gd/riders_of_the_purple_sage_movie_1925.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/91689226330.pdfIn PDF document text
    • http://gixunov.rf.gd/93251768176.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/rusejewasuje.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/computer_hardware_chip_level_training_institute_in_kolkata.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_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 5076 bytes
SHA-256: 0465821f74aca837740010ff1fbca0a991a9b3aef5e78d6f45b6bc9c5ef699d2
font_01_sfnt_off00010665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 10348 bytes
SHA-256: 893b032bf02716540dd5151fc2b61177fcce11e4b1eafa984e2435a630f56709

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