Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e788204babee4c…

MALICIOUS

PDF

49.7 KB Created: 2020-11-05 21:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d289eaad2335244c898ea7a34e10a9ea SHA-1: 9c0e769405de6829b3a0c5bff894bb224046127b SHA-256: 01e788204babee4c5be5d0b86ea19ff452e3cc5e67782ef9167d5b7715f620a9
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 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 1.0000

Heuristics 5

  • 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://traffnew.ru/strik?keyword=badlands+chugs+health PDF link annotation
    • https://tozuxixawijere.weebly.com/uploads/1/3/4/5/134523333/9434192.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/ruxasasaduri-mewoseki-pawelakidas-minekanolodenid.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/matuwaduwuvibad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f9b94fa7a90e.pdfIn PDF document text
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/6169811.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/b733cfda5df3956.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/tujotevevar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f99b7d226a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5f956470c54a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f8cf2c5de704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f99322b90405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f95e139650b5.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/henghuili-files/orthographic_projection_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebac091-dde1-4736-94ca-b452f428427a/84364755997.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/captain_marvel_comic_story.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 5152 bytes
SHA-256: 7820e0107d822872936e31e89ad9aa1072e4c0cebb76c2991046772fe8fd76d9
font_01_sfnt_off00007f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F24 10848 bytes
SHA-256: b19cd6d12daf235e3bdcdedffab54d80196594c0d74ee670d13e95e09f42f6f8
font_02_sfnt_off0000a469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA469 16296 bytes
SHA-256: d5ba6d66c3b13f33ff65e5ab89598ad158011f02ec2133c7a5bc162e79422677

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