Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b9c0de22453b29…

MALICIOUS

PDF

98.3 KB Created: 2021-03-22 09:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6cfef9f06d5f3f9c078b12c0b689cae0 SHA-1: 371839fbb8b20a09989affdb3c3b4e83ee841f49 SHA-256: 49b9c0de22453b297346490d96f0821b72e088b7ad5d55e237b6f211fae0f4cc
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=current+affairs+in+english+pdf+2020 PDF link annotation
    • http://libuwapuvewipev.mywebcommunity.org/farming_simulator_2015_xbox_one_cheats.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/syma_helicopter_wont_charge.pdfIn PDF document text
    • http://fizebiredasibi.mypressonline.com/mibiwigoridin.pdfIn PDF document text
    • http://biomaniks.website/43505627011lac3p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_602513451a986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_601ff5b5d834f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453344/normal_60047a301b523.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/26949518042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_60399b1bec7e3.pdfIn PDF document text
    • http://nazhivy.net/pdf_to_midi_converter_macha5x6.pdfIn PDF document text
    • http://mixit.info/lauren_kate_fallen_series_onlineqzu93.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/f9f100d3-b934-43f7-b4e2-b509e0e05081/51301458391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea09678-6b6c-4b8c-bc6a-301003918610/zujefonogumoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/shala_darpan_school_allotment_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfc08db-147c-4774-92ca-2d4863942473/financial_algebra_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/66376741850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1725d1de-4574-4e9c-9075-471c2126c698/gabevilutojetom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b418279c-0c4c-42b0-9b93-d3be55847efe/kisekotusunovedemujegurur.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_off0001332b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332B 5372 bytes
SHA-256: 33ab90b59024143b41a2834d8e08ab56bd29e28d8eed6df38243f48d62a39f13
font_01_sfnt_off00014563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14563 11516 bytes
SHA-256: b1dde3b0975d6d81a250e90955e5765bd62f01d591314bec421ca95a16f4accc
font_02_sfnt_off00016c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C46 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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