Malicious PDF — malware analysis report

Static analysis result for SHA-256 372058d5111de5b6…

MALICIOUS

PDF

77.9 KB Created: 2021-03-22 06:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 73bc79e691428adf8f2062408f2a5934 SHA-1: 65ab147ecbd8ba5e92a6257d8b47638af367e643 SHA-256: 372058d5111de5b68fccbe2fb8fe381f9165e7910dc8b70702a5e7cb47dbdbf0
194 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/wix?keyword=construction+management+fundamentals+2nd+edition+pdf+free+download PDF link annotation
    • http://dikagowoxi.sportsontheweb.net/graco_duetsoothe_swing_plus_rocker_sapphire.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/jizomojusa.pdfIn PDF document text
    • https://sazagirisama.weebly.com/uploads/1/3/4/5/134585928/dabizuwimoj-toviw.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/movie_based_on_the_falling_man.pdfIn PDF document text
    • http://hookup681.site/tikalowejunimavnr7vm.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/26937356180.pdfIn PDF document text
    • http://vehicleusains.com/buvadig7icru.pdfIn PDF document text
    • http://irisca.online/42920279447sbmgq.pdfIn PDF document text
    • https://xoruvuxana.weebly.com/uploads/1/3/2/6/132696063/6ab4b6de57ed10.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/beats_solo_pro_wireless_noise_cancelling_black.pdfIn PDF document text
    • http://winclean-shop.space/samsung_smart_tv_remote_reprogram_buttonkmywj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_86664c51b9634f8683409cbe80f3d5f0.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_eec4e8c674514e02b7578e008c7594cd.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_2de27274aeab4389bd725e09b81b1c04.pdf?index=trueIn PDF document text
    • http://dinixebun.epizy.com/pedaleira_zoom_a2_para_que_serve.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_eedfa608fa814c52ba9cdb7658e65ed7.pdf?index=trueIn PDF document text
    • http://fotiworoz.epizy.com/what_is_woe_diet.pdfIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_4b103d699dce4f32a0e2f10a4f5c22d7.pdf?index=trueIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_to_run_java_web_application_on_localhost.pdfIn PDF document text
    • http://lokokojorivumi.rf.gd/agricultural_mechanization_and_machinery_management.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD864 5604 bytes
SHA-256: 560ea9abac8d239399f4f88eb490d65285b8ef836d565572fd71918874b91462
font_01_sfnt_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 10600 bytes
SHA-256: 574df8e229ea74947678cfc2f76d4fd70ec2cc6f5b055defe9983e0c2641d7aa
font_02_sfnt_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 17344 bytes
SHA-256: e3808ab61e2bccd793450bac39777eba14f4f85d54dc47ba43358152daa7b5d6