Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd6992c4bc6ee44…

MALICIOUS

PDF

70.0 KB Created: 2021-03-22 21:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7c7400d22bf1a52ec4646e88e81d86e3 SHA-1: d4e8fb91b78909653f74455db5462164901ed4d0 SHA-256: 5fd6992c4bc6ee446f3f53efb384c40f2c83a695792605ce9beff5bc6085a1e9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • 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://baarspo.ru/123?utm_term=dlink+8+port+switch+datasheet PDF link annotation
    • http://futubog.22web.org/platform_bed_plans_for_sale.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/bb2ccafd0d3d.pdfIn PDF document text
    • https://zugavugusalozi.weebly.com/uploads/1/3/0/7/130776271/tixanusez_sijakalelu.pdfIn PDF document text
    • http://100p-f.ru/kushiels_dart_audiobooks0df9.pdfIn PDF document text
    • http://demask.space/management_des_entreprises_coursoi42t.pdfIn PDF document text
    • http://fb-copyright-help-from.com/top_10_music_album_sites0t0ke.pdfIn PDF document text
    • http://requiremcgood.com/jag_r_maria_1979ds0jq.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/faa_aircraft_maintenance_technician_handbook.pdfIn PDF document text
    • http://ijmalan.xyz/41207184839w1pbt.pdfIn PDF document text
    • http://tuimag.ru/25292340276ytxty.pdfIn PDF document text
    • http://ketosimple.online/optiplex_7010_dimensions01dlm.pdfIn PDF document text
    • http://damita.fun/grade_8_algebra_worksheets_south_africaysmby.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/buddhas_brain_chapters.pdfIn PDF document text
    • http://sk-anker.ru/how_much_does_xfinity_security_costixcb3.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/76488694331.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/information_technology_degree_online_reddit.pdfIn PDF document text
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/mudijovuku.pdfIn PDF document text
    • http://mujakomafadumuz.iblogger.org/que_es_un_enlace_quimico.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/e7a77.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/punar_lafirux_lasepiw_judefu.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/viking_range_repair_atlanta.pdfIn PDF document text
    • http://hairsprof.ru/excelsior_scholarship_suny_collegestj7f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_4738cb774e47463b83bd8f0f63cab8bc.pdf?index=trueIn PDF document text
    • http://pamagidobiguvi.rf.gd/86607719725.pdfIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_d6e901f331704b71ba78d51d181fea34.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_a5f0fbed41ae483fa201183b42b70861.pdf?index=trueIn PDF document text
    • http://topufopotu.epizy.com/masilajid.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_0495cd7d7deb4fe585312dca0ca864ee.pdf?index=trueIn PDF document text
    • http://nazifaba.rf.gd/xebeson.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_3da070e24a48466db11e5fa865973196.pdf?index=trueIn 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_off0000d5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CB 5508 bytes
SHA-256: f79cf3a839ad51ee452430e61e436332d6b6f8788672811335119077d3562f46
font_01_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 9796 bytes
SHA-256: be4f42dd48d2b2cace36ab830286c49a3414ed78b6e8bdbe58a811a57d66949e

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