Malicious PDF — malware analysis report

Static analysis result for SHA-256 568d8f1e78f4ea58…

MALICIOUS

PDF

72.0 KB Created: 2021-04-07 12:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59833e3c9386f0d1c5c7ff07bc1b5afb SHA-1: 9998565d5179225805212679423006a217f95e14 SHA-256: 568d8f1e78f4ea58a55effea3843d73716cbf73c7df17254f3062d70555a5357
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or distribute further content. The primary URL, 'https://jumiwimov.ru/aws?utm_term=answer+key+for+math+expressions+grade+3', is presented as a lure. While no scripts were explicitly extracted, the presence of external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/aws?utm_term=answer+key+for+math+expressions+grade+3
    • http://jukojadijomefar.medianewsonline.com/95321316356.pdf
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/689de92.pdf
    • http://bikokobolo.sportsontheweb.net/asme_pcc_1_free_download.pdf
    • http://serururepus.scienceontheweb.net/how_to_never_chase_a_man.pdf
    • http://kemikavar.mypressonline.com/zutapotovuloxifetusuli.pdf
    • http://tapidiv.medianewsonline.com/72752947832.pdf
    • http://tixanijematewe.mypressonline.com/vobutezeduzibovanezapaz.pdf
    • https://porijupipisezug.weebly.com/uploads/1/3/4/7/134718457/f68a2cbc921e8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66bf0809-7604-4795-87eb-4a01644bf231/fallout_new_vegas_console_commands_item_id_list.pdf
    • http://vekifaxofezawe.epizy.com/police_reports_yorktown_heights_ny.pdf
    • http://buzepokeker.epizy.com/pogoxemulaxir.pdf
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_3355ecaa00d6436bbb9037bf0e5ddd5e.pdf?index=true
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_6ab5ec62215d4522b5738863b47d586d.pdf?index=true
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_394bfb9b01014bcfbc17f7479075d5fc.pdf?index=true
    • http://jalameki.epizy.com/tatajotikifigakilero.pdf
    • http://bavigozobuk.rf.gd/bazowodoxosisevumukob.pdf
    • https://uploads.strikinglycdn.com/files/9f783c80-6ff3-4d09-9d99-625c6e0d8080/rebadabudexada.pdf
    • https://uploads.strikinglycdn.com/files/cd5f0f5c-a941-44e5-9ae3-84131e178be4/67914535658.pdf
    • http://domuromu.atwebpages.com/how_to_do_a_post_construction_cleaning.pdf
    • http://redapisepiwu.epizy.com/17148215539.pdf
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_76bb248282274bc6b24e7f9999d867b4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/143c9a52-10d0-4dc4-97ef-9608122c1c6c/how_to_remove_drm_from_apple_music_on_iphone.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d951.bin
8f70f2bf25531d145d7c00f70c3555294f33f721e9183b4b59e9d047b9a5c986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 5904 bytes
font_01_sfnt_off0000ed6a.bin
eb2e67dbb453197d9b11cca4eb355d417180a233c27b532db410f89c488e9e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 10828 bytes

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