Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c498ffea740b46…

MALICIOUS

PDF

86.0 KB Created: 2021-02-06 03:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0fbfe362de55801580e3f5b8a76b2cd6 SHA-1: 53a70562cef4721d7af1f007ca641e92b249947c SHA-256: 20c498ffea740b4637724190821478a9c5da7ba7936b9d6bce04b56b0089fb97
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that redirect to various domains, suggesting it functions as a link farm or phishing lure. The presence of external URIs and a link farm heuristic points towards an attempt to direct users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wb?keyword=awdhesh%20premi%20ke%20gana%20video%20song PDF link annotation
    • http://nout-prodat.site/binibavivekigeriku9v1ei.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/vevo_video_mod_apk.pdfIn PDF document text
    • http://winsl.space/mipagewotomafhggsd.pdfIn PDF document text
    • http://juxefagag.22web.org/manual_chevrolet_traverse_2018_espaol.pdfIn PDF document text
    • http://gikiwasixe.66ghz.com/farewell_party_flyer_template_free.pdfIn PDF document text
    • http://on24-system.club/telenovela_a_madrastra_capitulo_603h3sv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5fecf872e35e0.pdfIn PDF document text
    • http://sberin.xyz/14833347102f2byr.pdfIn PDF document text
    • http://pitushok.fun/3956771372zywnj.pdfIn PDF document text
    • http://klokisik.space/debugewitjvx9z.pdfIn PDF document text
    • http://onlinesos.tech/bayesian_statistics_an_introduction_4th_editionudgfm.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/hdjfCjj/online_games_free_to_play_pc.pdfIn PDF document text
    • http://bristol-yalta.run/analytical_mechanics_hand_finch_solutions_manualfu6mt.pdfIn PDF document text
    • http://glasshookahcatering.com/grimmett_and_welsh_probability_an_introductiono1n1b.pdfIn PDF document text
    • http://easy-money-cash.space/599896421449syhb.pdfIn PDF document text
    • http://wopivobozas.66ghz.com/please_find_attached_our_proforma_invoice.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5fe4b6c867051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vodupuginotipir.rf.gd/chiltern_railways_live_information.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 5544 bytes
SHA-256: eabaf9f3082f62cb540c6c4b96066e25c02c87764abb321da4716105632058dc
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 8908 bytes
SHA-256: 25b392d6cd41c126d3657bc1ed0634826308d00d2abaa78109d6f0811dea1de5
font_03_sfnt_off00011a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0A 15516 bytes
SHA-256: e7f37526e755b7e9c48db19e1d8648f874401bfbc53a934ebdb874bed38f24c9

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