Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d44cdde117d7524…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 05:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 26f9b5b55cd73d15cd87bfdeb686cec3 SHA-1: 71cdb508a4d1926499a16d5ddf30871a4cf56a2e SHA-256: 3d44cdde117d7524a77c6ba54fed5bbe73197742e00f38f17afd97570819e438
176 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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nipisod.ru/wix?keyword=90+degree+hdmi+cable+lowes PDF link annotation
    • https://cdn.sqhk.co/rilixuzewiv/Mihhjih/best_online_games_2020_mobile.pdfIn PDF document text
    • http://koolmaxt.online/63570265701s1z2a.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jhphb52/t_i_game_super_starfish_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_601e0685bb5dd.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/nEggHja/gijomilinusigowirufixokuf.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/hhbughd/99392136075.pdfIn PDF document text
    • http://idealicaufficiale.website/fusionner_2_pages_mac7jl4o.pdfIn PDF document text
    • http://gamedv.design/kasedabifrz2fc.pdfIn PDF document text
    • http://help-verification.com/how_do_they_do_an_echocardiogram_testb99om.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/nobologaved_kakovexodenovi_riboteropuzo_gumigunexeko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444649/normal_5ff07a1f72135.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/5b87094712965f.pdfIn PDF document text
    • https://sirukume.weebly.com/uploads/1/3/0/8/130814715/buzipalexugolot_kumeba_pimirimonoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387925/normal_5fde51dbf18f6.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/gewituk.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/ieAifFr/free_pcb_design_software_for_cnc.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/pokixovuxik/jixovu.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/java_8_64_bit_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/gekesewakowababaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/home_language_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/dexitaxaxukokodunijube.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/ponniyin_selvan_movie_news.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/descargar_er_y_private_browser_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/define_discipline_and_punishment.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/ff13-_2_trophy_guide.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_off0000e4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 5788 bytes
SHA-256: 11d557d12fe09b842d5f659e08c61bf8ffc87083c46055a1628ff002f17687d1
font_01_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 12368 bytes
SHA-256: ee841289f78fa6e4a2493ddc87680b927be443d93c4ead728440064487783c9c

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