Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ff974e478f66e1…

MALICIOUS

PDF

72.6 KB Created: 2021-02-23 03:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2e70ffb3e81553b92ecceb640399b502 SHA-1: 174e259b004b2db870921c00a8e69d94adc6933c SHA-256: 37ff974e478f66e1c40e2886c1c3f1952c9847d177adf9bbad1851aa302e381b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=probability+theory+for+dummies+pdf+notes PDF link annotation
    • https://cdn.sqhk.co/fefowofuk/YignMha/11953388747.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/fjcMwgc/royal_caribbean_cruises_alaska_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/hhjegfw/sisters_thai_potomac_menu.pdfIn PDF document text
    • http://lixejinokegiror.22web.org/18833865608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384819/normal_5fedff8e44823.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hdn1WPs/coin_master_gold_cards_free_2019.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/vekijako_galoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_603447d24b849.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/gehdopW/book_my_train_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/kEhiXjc/25902774018.pdfIn PDF document text
    • http://zewojapu.22web.org/tosujasopupoxufalemedeleb.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/04b6a7d2bb.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/1577986.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/uKujcX6/25853706233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronopijitol.rf.gd/karateka_classic_apk_1._01.pdfIn PDF document text
    • http://kojajopi.epizy.com/carrom_live_3d_game.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/tepuzidibo.pdfIn PDF document text
    • http://mafixatoje.epizy.com/46203002185.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_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 5524 bytes
SHA-256: 7dfa05307c2923fd02f1b9b2701e4aaa1d60b1452aa05aa7fb89dc5381173a41
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 10956 bytes
SHA-256: 0275078a8db6682502c691923670abc75305e608cb0d4e2068103707cde060ac

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