Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf78b01cca8122c…

MALICIOUS

PDF

75.1 KB Created: 2021-02-24 18:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2e35d8a83d558d47add88253889a78e1 SHA-1: 5f88e6c621b5cb2c563c12ea0c3d0cf7543f996e SHA-256: 6cf78b01cca8122cad4caf1b5a85a9c443526a8c16e5fede940ece4f4e078aad
206 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and exhibits characteristics of a link farm. It contains numerous external links pointing to disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were extracted, the presence of embedded URLs and the overall structure strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=how+many+mps+are+there+in+the+marine+corps PDF link annotation
    • http://fesotisifofil.mygamesonline.org/first_grade_math_standards_cheat_sheet.pdfIn PDF document text
    • https://dumugukof.weebly.com/uploads/1/3/4/6/134647937/zusiwoma.pdfIn PDF document text
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/7271514.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/9745059.pdfIn PDF document text
    • http://kakopeku.iblogger.org/90546553087.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/55995717490.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/on_the_road_truck_simulator_console_release_date.pdfIn PDF document text
    • https://lojopozubog.weebly.com/uploads/1/3/1/6/131606756/5272516.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/love_dare_book_free.pdfIn PDF document text
    • https://favonewe.weebly.com/uploads/1/3/2/6/132695639/wakunewaf-pesoripiborim-lixomi.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/pupilide.pdfIn PDF document text
    • https://wigobozigor.weebly.com/uploads/1/3/5/3/135345973/nozitatuxijevojiwex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/food_safety_net_services_phoenix_az.pdfIn PDF document text
    • http://mufifofoge.epizy.com/full_size_bed_sheets_and_blankets.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/rolajipobapavufugolugox.pdfIn PDF document text
    • http://tukudapig.epizy.com/equivalent_fractions_to_percents_worksheets.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_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 5296 bytes
SHA-256: 17d87c903c1b016950bb59f54f8e479ba79a210de0b9a3e0ca826294bdba66b1
font_01_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 11204 bytes
SHA-256: 3afa0683f7a00230016ce7b33d35c71caf0f681b825c53dd5f25d0cf22710d80

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