Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2d0ecc304ce381…

MALICIOUS

PDF

77.2 KB Created: 2021-04-06 15:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 62becff15d56e710b12bc70a6ea1b5db SHA-1: 251cf06e078141f86a3ddd8cae21127610dbddc4 SHA-256: ab2d0ecc304ce381b70ac2214e22060da045e7649aa262587b8d56682df3444c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains a large number of external URIs, many pointing to disposable hosting, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of multiple external links and the overall structure strongly indicate a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=do+dachshunds+need+sweaters+in+winter PDF link annotation
    • https://dibulikari.weebly.com/uploads/1/3/4/2/134235408/matitoru-rajuvobekib-zilile-zasoto.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/cyvz6id/angry_gran_radioactive_run_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5feb7b85bf280.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/ascii_code_definitionrdlih.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426543/normal_6057cce81a0c6.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/2gHDhiN/vaxawedinopave.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/3icgdje/spray_fast_stencil_art.pdfIn PDF document text
    • http://oblakova.ru/27148002890n52fs.pdfIn PDF document text
    • http://vipadminler.org/how_much_to_replace_heat_exchanger_ukgli9x.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/accrington_academy_sixth_form_number1o59a.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/ibghEjc/fukazugujikut.pdfIn PDF document text
    • http://storeyou.store/dusokejabjutu.pdfIn PDF document text
    • https://tugupititu.weebly.com/uploads/1/3/4/8/134887320/437dbdfc7b759.pdfIn PDF document text
    • https://giromotazipajid.weebly.com/uploads/1/3/1/3/131384567/baburabujutit.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/hheidgh/colour_bump_3d_game_download_uptodown.pdfIn PDF document text
    • http://lofitner.buzz/troy_bilt_2410_snowblower_spark_plugwl4yp.pdfIn PDF document text
    • http://vinnipoh.space/solar_eclipse_animation_in_powerpoint3of0q.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/e7f16fb85998887.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/haiahjs/spin_bubble_shooter_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/Pvhehfb/91627040522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 5084 bytes
SHA-256: 68f38c15528476e216baef9ab5b3009ef2b891cb4bb20e1648a175519b930e59
font_01_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 10428 bytes
SHA-256: f58cb55518a2704c5eccdd15b8b8b8071484322882e6787e211a834726056afa

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