Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2e0b4254bba123…

MALICIOUS

PDF

75.9 KB Created: 2021-03-18 11:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c27d1a63fe00f3bd71cd8eb3b0a6ed9 SHA-1: 9a5dff0ff2c81bab7734064ce0a77787d957e407 SHA-256: 7c2e0b4254bba1236fa9b6812c13ba4b5d8871aa43bb81ae27c413eb72ffb280
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://botokaw.ru/aws?utm_term=which+foods+have+complex+carbs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421970/normal_60052012e8ab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ff587f02803f.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/ihLUiMb/ark_survival_evolved_mobile_apk_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_603e3625da7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_60183f89e0337.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/rubesofososedutemobox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5fd7ef1310450.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffa1e176582e.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/85656272141.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/eIgeghq/is_64_bit_faster_than_32_bit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugerubuvugox.myartsonline.com/download_tabel_asmaul_husna_dan_artinya.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/sample_affidavit_philippines.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_c5c8f0df2d544e34877bb229f52d326a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/024a0506-bb4a-4ff0-a5c5-3b0787d97701/tovifojuvivitejaniradovon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4ec651-f559-4c3b-a6f8-55aff383bb65/photosynthesis_and_cellular_respiration_worksheet_answers_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71d9c9d-6bf2-4fee-a538-eb600dfa33a7/what_is_the_biblical_evidence_of_purgatory.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_e92450205a344800847b8978de53e84d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3ba5df-6452-4734-9644-e554dc4d29ea/17346822544.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/pradhan_mantri_awas_yojana_list_2020_west_bengal.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_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 5676 bytes
SHA-256: b3b3c08132bfba2393ac5c2dfed83738823f3843ecfe0d8abb8955a022c5c8c8
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 11128 bytes
SHA-256: 61c508f5724d78737c77f51cd811221040e890e119d8d45b10f5c753994e141d

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