Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d0caca9d17bddc…

MALICIOUS

PDF

86.8 KB Created: 2021-03-09 19:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eefa2909963d6fbf0247319e0b992b8b SHA-1: b12b0849209dfc8ea4769be965072a400abe6b9f SHA-256: 44d0caca9d17bddc894e3489ab2b7a3c4010c87b5579e514a96735b42ff5a58a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further 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://mezovuduw.ru/award?keyword=moving+bed+catalytic+cracking+pdf PDF link annotation
    • http://easterthjg.com/beginners_guide_to_tig_weldingx8e1o.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/how_to_manage_disruptive_classroom_behavior.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/shark_navigator_vacuum_repair_near_me.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/98222963864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fd3b1617ada0.pdfIn PDF document text
    • http://design-kvartira.info/zibemimamugegilimkznk.pdfIn PDF document text
    • http://brettlockhart.com/863591856549nt5i.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/ximima.pdfIn PDF document text
    • http://trynutra.shop/robadagixigaxemurotekv7r.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/magic_the_gathering_basic_deck_building_tips.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/22938704462.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/carl_jung_dream_interpretation_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451950/normal_600235e9d903a.pdfIn PDF document text
    • http://lg-supportteam.com/ipod_mini_replacement_crossword_cluetxc8q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikusaduxofi.atwebpages.com/how_to_check_thermal_fuse_gas_dryer.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/the_ghost_of_canterville_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/ford_windstar_2003_for_sale.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/xexalewiwisusasebalodoto.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/black_and_decker_chv1410l.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/conservation_of_mass_problems_worksheet_answers.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/mexokosekebuwaf.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 5516 bytes
SHA-256: 1b3788186a95e7a857d6f009230c0b395a3f972edd7f6fabd79125c290167cc1
font_01_sfnt_off000129fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FC 10544 bytes
SHA-256: 3a970e1d8daeebf340c972dbebe68ac5ede048f426b69589a5b8f517ab08fb10

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