Malicious PDF — malware analysis report

Static analysis result for SHA-256 790be97ebd47815d…

MALICIOUS

PDF

68.1 KB Created: 2021-05-19 02:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c0dfdddd3a49449404e15a3c0233ee7a SHA-1: b08ee79b6b14feb56ef89ef4f75c15aa7b6530ae SHA-256: 790be97ebd47815d09f60d236e0828f238e689e2fa6ad27a7eba3452769655fe
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 0.9996

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://seumenha.ru/strik?utm_term=dgs+temel+kavramlar+testi PDF link annotation
    • https://xizerusepu.weebly.com/uploads/1/3/4/3/134308384/fc401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ff0356eb8882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365560/normal_5ffb896ed1b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_6032171f63553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5fe647008f8a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5ff2181ee6f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489835/normal_6027f5698ab7c.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/2834530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_5ff16c54d72b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_60595613c90a6.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/tivagalaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5fd1404d25716.pdfIn PDF document text
    • https://menufaron.weebly.com/uploads/1/3/0/7/130775522/jejofidonovija.pdfIn PDF document text
    • https://jesuzexujugom.weebly.com/uploads/1/3/0/7/130776612/8740932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471095/normal_6008b8bc72038.pdfIn PDF document text
    • https://bipejazikapidim.weebly.com/uploads/1/3/4/5/134529651/3115038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20951287-6b6d-4d05-ba02-64e7042e6ac0/el_pollo_loco_menu_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8996b5-42bc-48a3-851a-4ff7e83b2c7b/renisikoguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af53af28-9e6c-4cbc-b706-d01a7af80a27/what_to_the_slave_is_the_fourth_of_july_close_reading_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d674fd-8f64-48a5-9863-a2b395e62f21/lusesiloxosigamaxiwaxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa0f27f-c5e0-4ec1-bdb9-9c6c48b31b29/zafewaz.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_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 5128 bytes
SHA-256: 9aed04d5a7b8e811fa5fc8b3792fc1e78331237372df10cffd96360a76438911
font_01_sfnt_off0000dea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 10896 bytes
SHA-256: 7727c49d3b12a6637375b10fd9d895fbd7ad3ef4cd710d8e36a0f72754cebe23

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