Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff97164a5404c56b…

MALICIOUS

PDF

54.9 KB Created: 2020-11-06 10:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: de90bdfaa5ed81074305863d92ece85c SHA-1: 269c2abb6ce1ee2b43e3f54bc58b21db09db2f8b SHA-256: ff97164a5404c56bc416a4b6b35c3495d132f0055458678ff3f9db1eb8395ff8
96 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 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 4

  • 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?keyword=ex+file+explorer+apk+download+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390383/normal_5fa2a10a25cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f91987659b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f966c61cd712.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5f97273b43303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f9fb9ad078ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_5fa495d041cb0.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/0ccba418f.pdfIn PDF document text
    • https://riseriku.weebly.com/uploads/1/3/4/5/134585500/jusugabanugum.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/603af738-c92b-4cf9-b435-bc6b4d7b3dcc/83213891888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdff040-4941-47c9-8de6-36797d468486/salesforce_crm_content.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/57591541030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4633e3e-8e25-4f1a-b4e0-070cc038ebe9/fetimavamogiwudoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fba4e8e-713e-4b4d-a939-520f9ceb235c/8812800422.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009ef6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9EF6 26880 bytes
SHA-256: e66d0f8b1c0a542051613531d9881b4ef035589897437a3abf374c5c62bc8585
font_00_sfnt_off00006789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6789 5036 bytes
SHA-256: 495ed8d2895eeefea3653624709c1424438694d8f5508981b40f758060251214
font_01_sfnt_off000078d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 11180 bytes
SHA-256: 57e3123c0a74c5ec563439b32ba9a5ed3df8fc785dcaf1d4a1657e3e1fa37f30

Open this report in the interactive analyzer, or submit your own file for analysis.