Malicious PDF — malware analysis report

Static analysis result for SHA-256 8253e37db69c2d80…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 17:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8a000693e303328f9877b1607386c824 SHA-1: 951697aff08e5df997e496647cb7ea8541b29535 SHA-256: 8253e37db69c2d80de0b4aadf0560c31b0c7eedfb4acb94c15a5759fee90db42
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI. The embedded URL, 'https://zajinet.ru/123?utm_term=hearts+of+iron+3+black+ice+guide', suggests a phishing or malware distribution attempt disguised as a game guide. Although no scripts were extracted, the presence of a malicious URI and the overall detection profile strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/123?utm_term=hearts+of+iron+3+black+ice+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461485/normal_6029edfc557c0.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/divergent_download_in_tamilyogi.pdfIn PDF document text
    • http://capridigi.com/how_to_make_spy_glasses_at_homed0fgb.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/walmart_albert_pike_automotive.pdfIn PDF document text
    • http://true-board1.club/311911330609d4y.pdfIn PDF document text
    • http://latuha.com/unsettled_tom_meme_templateoohs2.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/fisher_price_rainforest_jumperoo_age.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408336/normal_6003645fc8d91.pdfIn PDF document text
    • http://delaem-sami.online/what_is_the_wps_button_on_a_routerhj7z5.pdfIn PDF document text
    • http://senteber.site/what_does_it_mean_to_have_scheduled_maintenance5vsf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_6026069c3d11e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_60358767b0658.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/14893863031.pdfIn PDF document text
    • http://secureappeal.com/xidomosagi9ej46.pdfIn PDF document text
    • http://palitra-cveta.ru/who_is_paige_vanzant_engaged_tory5he.pdfIn PDF document text
    • http://videohost.space/9339097849du0z0.pdfIn PDF document text
    • http://xtw2.club/7257211302487mjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_602c52c5c8aac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450507/normal_5fe3d9c725b9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/razozusufakijifivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/aashiyana_mera_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/durable_power_of_attorney_florida_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/browser_vpn_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/argumentation_schuluniform_musterlsung.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 5516 bytes
SHA-256: 9d392668488268c8c27df02335ba93ca76a172ed92a528a68b07942ec111b4c9
font_01_sfnt_off0001075a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075A 10268 bytes
SHA-256: 328c7b4b36587ede18721e3896e6d1b0c6e0361a26e3505e19b2843c303f87c4

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