Malicious PDF — malware analysis report

Static analysis result for SHA-256 699ebd500fc997bc…

MALICIOUS

PDF

72.7 KB Created: 2021-06-05 19:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b9a93463af2591393c16b667e4d3a98 SHA-1: dd7e38d238bd5c98a15d50f5986db39ee086481c SHA-256: 699ebd500fc997bc9edff45ea66052c9c9a2bb74f84f287890de5fe53858d72f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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 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.
  • 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://cructi.ru/pbw?utm_term=filmywap+bollywood+movie+war+download PDF link annotation
    • https://bawenijujobafo.weebly.com/uploads/1/3/4/6/134670929/8c09f.pdfIn PDF document text
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/zivasim-nufizivemomule.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/xigixep_negoxafaviwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_6061442e4a742.pdfIn PDF document text
    • https://tipidaxu.weebly.com/uploads/1/3/0/7/130739537/121959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_605655b1c6a70.pdfIn PDF document text
    • https://jugoneworo.weebly.com/uploads/1/3/4/3/134307205/sesobabizavas.pdfIn PDF document text
    • https://dofuzubakav.weebly.com/uploads/1/3/1/6/131606612/472e5bfc00.pdfIn PDF document text
    • https://visosoduvevup.weebly.com/uploads/1/3/4/2/134234588/2633172.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/48e3d68f-fd0b-409b-ad63-a7cd8b647440/62646192147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e123694b-1f6c-4ee1-a46f-9b11b9b12f93/13952330437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a28e83-b12d-4db5-96f3-acb9658058f3/how_to_save_as_mp3_garageband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28191dca-769f-4acd-9bdc-511ffeba18d6/mosekatuxurogakozodefekef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992c1e7b-1206-4611-96a9-d4406765026e/computer_hardware_engineer_schools_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e69c705-5ae1-4038-adca-645608e2b39f/93598099708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0d4b69-58ec-470c-a022-517f479aa2c7/wavobifuguredoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7bcf74-e382-4972-8d3b-7d7f19d0a460/la_crosse_technology_atomic_digital_wall_clock_with_indoor_outdoor_temperature_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be7d6e6-d55f-4e65-91cf-977fe05dfae5/36726855190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f23f62e-98cf-4d5d-9df7-5e148111e9f0/galetogegefefakufed.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_off0000de8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8E 5276 bytes
SHA-256: fa098ebca33f7180a63c558ee51312ff2248ed75f40df4f0513cd6117ade0b6e
font_01_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 10908 bytes
SHA-256: fcb58739e512769d9ebb6a2faae0e4ce01e267cfe86507aca77bbac4595f8c14

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