Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afa6ce5dbad64df…

MALICIOUS

PDF

78.5 KB Created: 2020-11-17 19:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8c7066bee16b34c21a0f67dfd0822547 SHA-1: 6608875019deb04c55e29defbebc1c2f1f59eb76 SHA-256: 8afa6ce5dbad64dfa743c491048986bd1392b100624b36a4e8d461cff8e43e9c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing operation. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially malicious content, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://traffine.ru/123?utm_term=leica+d+lux+4+panasonic+equivalent PDF link annotation
    • https://gerozelijoxujib.weebly.com/uploads/1/3/4/4/134476991/21617.pdfIn PDF document text
    • https://sofivowipaduru.weebly.com/uploads/1/3/4/4/134454637/jupugokemilen-jatufozumeloro-kiwelolutap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f9a8b7ab656c.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/mukelanudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8abbf3a991c.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/pokedubi-kadebuzez-guzemamixebut-sudimifepanol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_5fa222cac936d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f8bc58e3dc37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liguwubore/asphyxie_mcanique_mdecine_lgale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad0e3c5-e189-4822-b726-c708a320054a/64686086325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d9751a-0fbd-4042-881c-eb5fc0d4e141/junumoxoro.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_off0000f4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E5 5256 bytes
SHA-256: 4d787cc1dcfe6cedad76a6c2cb8b5bf4887aa71f223e5e7a3b048ed3e15001c1
font_01_sfnt_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 11228 bytes
SHA-256: 1933c54a127c966f8d51cb8c04f18172dc2b84b89fa760f5e3b9c0fefd011441

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