Malicious PDF — malware analysis report

Static analysis result for SHA-256 002487fb40277032…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 21:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c2ed11ec41eb3fed1bf366e763a9b255 SHA-1: cd4ff10a982848944c5d6c1e8dea48890cec4097 SHA-256: 002487fb402770327cb0e161dbb5e6ac97de718bda74db103ac3136d6e4270ea
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document employs a social engineering tactic, specifically a browser extension/update installation lure, to trick users into believing they need to install something to view content. This is further supported by the presence of numerous external URIs, many of which point to disposable hosting and link farms, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://fokemale.ru/award?keyword=ashraful+insha+2+pdf+download PDF link annotation
    • http://sodahq.club/duremuziy1nhz.pdfIn PDF document text
    • http://cardio-natural.info/what_is_the_price_of_a_new_rainbow_vacuumjfllr.pdfIn PDF document text
    • http://sandwichhq.club/defending_jacob_bookdy3b1.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/bolens_140cc_lawn_mower_wont_startg7mvn.pdfIn PDF document text
    • https://luwuruguvuwotom.weebly.com/uploads/1/3/0/9/130969706/fotubiwin_nubelezejazu_lojafif_nobuvofutifa.pdfIn PDF document text
    • http://italywow.space/85533282213q1lq0.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/vumobovadurog_difupijijatemi.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/57a1ed43bb4a.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/what_is_system_engineering_process.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/petunenimiza_rosatozoxuru_ramefikexinox.pdfIn PDF document text
    • http://omshop.space/sabamadomaledo6p1pz.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/86920f7fdf693e.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/ccfra_microbiological_methods_manualoaatt.pdfIn PDF document text
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/rufedetef.pdfIn PDF document text
    • https://kovexinuzik.weebly.com/uploads/1/3/0/8/130815277/bazoki.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/anchoring_script_for_school_assembly.pdfIn PDF document text
    • http://menformula.xyz/beguzojegonumukimirokbxpr6.pdfIn PDF document text
    • http://azalea.store/nazojukedelafuvazorvk.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/what_does_service_b_mean_on_a_mercedes_c300.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/binum.pdfIn PDF document text
    • http://baugroup.info/happier_ed_sheeran_ukulele_play_alongl6o4h.pdfIn PDF document text
    • http://setopin.mypressonline.com/54069538584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/83e0566b-21ce-41c9-9a25-e33d677268e3/ripalirinevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc22d805-434f-445e-b3cf-5f8c907a5bd5/20417505040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c526733d-8053-433b-bd3e-3a01569e1197/drawbacks_of_cultural_imperialism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3718731a-e272-4b82-834a-6b49f4a9ad58/bepimiwokerozagejizojixal.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/xalajuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 5024 bytes
SHA-256: a30c3c034714d4b022cf42aa044094dfdd7f13e92f432d5d1e1eabd961164921
font_01_sfnt_off0000fae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE1 10908 bytes
SHA-256: 00754a466a9110b5146b9be17e7445b9df9a275ca258d88cc2d72b375fab1721
font_02_sfnt_off00012045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12045 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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