Malicious PDF — malware analysis report

Static analysis result for SHA-256 daba53ec69ba95f8…

MALICIOUS

PDF

75.2 KB Created: 2020-12-26 06:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd760c6652bce418810f940abf474780 SHA-1: 9532d991c6d6fe4fd0f72f8f837961f1f5ab321d SHA-256: daba53ec69ba95f83b6f725aebb2e0dba9f277d4ba7738bd192c78555e6237ac
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 0.9997

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 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://traffking.ru/123?utm_term=lovakengj+house+favor+guide+osrs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452839/normal_5fe0ff1cc354d.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/3934222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fc1117be1150.pdfIn PDF document text
    • https://cdn.sqhk.co/buwepexe/ihc9nih/97279579870.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/0a102fe1766.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/bexan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f967b60250bc.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/2357488.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
    • https://uploads.strikinglycdn.com/files/2df5994d-483c-4422-9a22-b8bbca1105f6/similar_triangles_worksheet_grade_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eef8d24-df20-4b19-a360-ba6e51f8a731/78531918466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de773bdc-140c-4bf0-83ba-a6da8b404dde/romigilipukewojuneruki.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_off0000dac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC8 5080 bytes
SHA-256: e90d42c193e7216e1bc0c98e7d94ada057429579d77845a5b8f3507aadb0f4e4
font_01_sfnt_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 10864 bytes
SHA-256: f2f7e1ac69b808e4e1de31a0d1d552b07ef76cdd13050ae6a5b62227fd105f63
font_02_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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