Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d0204ae5e3a4fc…

MALICIOUS

PDF

77.9 KB Created: 2020-12-19 10:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 08185205d9b756e4873ff4ba9894e9af SHA-1: 9c8fe884de06954c7cc0773bc3700522d5f4bd9c SHA-256: 52d0204ae5e3a4fca1cff2dd43fdbbf3eac3a6bb12f6ef8fbd5edf430d726611
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-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.
  • 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://trafficel.ru/strik?utm_term=givenchy+play+intense+alternative PDF link annotation
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/womibekugol_nunuxag_sasaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5fa0319bc89c6.pdfIn PDF document text
    • https://rotowuvusokij.weebly.com/uploads/1/3/4/8/134884207/7728132.pdfIn PDF document text
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/2b6f1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5f9a0429b5369.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/subisari-welilemafep-dujidatepox.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/nuluregafizevexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_5fa55edd150fd.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/eed1f700-cc75-46b5-b2b4-c366c054d1f2/elevation_map_portland_or.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/fagakuwajubuxepujugax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e414db-eb7d-4756-9a0c-ca560daef5fb/31496517080.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc172a2084698658e621db3/t/5fceb926e4d8f2662cfc5ed7/1607383335312/simple_literature_review_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/zuravodife.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e3701969b523a41d4213/t/5fcb1e2e1ef6d1662fe9a48d/1607147054994/xebinidukesoges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0731dc28-eb24-4b82-af05-ae84a89cb0e2/bobomewigojolowidinixepun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1080505e-30dd-4693-96b7-497b51eead9a/bob_dylan_idiot_wind_lyrics_meaning.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_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 5212 bytes
SHA-256: a9ea08c11cd40fc703847d23c196bc606333b3270a3d9203df1c62aefed4d228
font_01_sfnt_off000105df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 10760 bytes
SHA-256: f9e80c2800590a32c4fb2a6c15afa86ac1aa5a0fd8d737ca8f7d3944ae25f3be

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