Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e8ee4f987f48fc…

MALICIOUS

PDF

82.8 KB Created: 2021-03-25 17:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 779c782abbce33bf04fbdc9e98c6847f SHA-1: c281bd1db9701305c51a8541c290198ffe976ae2 SHA-256: c1e8ee4f987f48fc10d42cf20eedd10ae47a1de1a037eec799aae7e71be84301
126 Risk Score

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 0.9996

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://dafemum.ru/award?keyword=o+love+divine+sheet+music+pdf PDF link annotation
    • http://cenderaoriginator.com/how_to_apply_iron_on_vinyl_to_glassttz6r.pdfIn PDF document text
    • http://finonit.mypressonline.com/94666719906.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/derulebapenepovuz.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/1ctpadl/13809921748.pdfIn PDF document text
    • http://dombitarf.ru/buvedodadosj3p.pdfIn PDF document text
    • https://selotisatopus.weebly.com/uploads/1/3/1/8/131856190/wujopamab-kufofexi-dijasug.pdfIn PDF document text
    • http://dusamoka.mywebcommunity.org/nuvirafifezikesudi.pdfIn PDF document text
    • https://bewulikafujisew.weebly.com/uploads/1/3/5/3/135326730/30fd7681e1.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/romidafurutobiketaj.pdfIn PDF document text
    • http://topsale.pro/10739541291sij5q.pdfIn PDF document text
    • http://terugate.mypressonline.com/btc_exam_date_2020_first_semester.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/F8Bhene/button_beep_sfx.pdfIn PDF document text
    • https://vuzupugum.weebly.com/uploads/1/3/1/4/131453250/wevovotizenugufoluk.pdfIn PDF document text
    • http://100naturals.fun/99509408808pzhxr.pdfIn PDF document text
    • http://alteramaks.world/android_13_clothes_xenoverse_2vvmpv.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/25df72085d.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
    • http://rosajeku.myartsonline.com/nikon_d5200_price_list_in_philippines.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_ec2095bb75254f5b9ba34186a18cdea0.pdf?index=trueIn PDF document text
    • http://dapufojutujat.atwebpages.com/bksb_initial_assessment_english_answers.pdfIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_906dda9ddd234426bed0f233c75d24df.pdf?index=trueIn PDF document text
    • http://ziwivazud.onlinewebshop.net/42338389957.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_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 5060 bytes
SHA-256: 7ef90954741ff1e358b604a2f667613ef2db98552320165e11e4687ad0d8b4cf
font_01_sfnt_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 10964 bytes
SHA-256: 4923926efc86e8b38686d205030cb646faec27634a56fdf3b9c32597714e1b4d
font_02_sfnt_off00012f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F67 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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