Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef72af8fe94388f…

MALICIOUS

PDF

55.4 KB Created: 2020-11-05 21:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a66c8556c561c3702a31065809dd130a SHA-1: dc3f0407f152dc8d96fd558a5f1819ba3176cdf8 SHA-256: fef72af8fe94388fcf0cfee9660d120e88f1ce8ef75e21c659b54feeb495046e
104 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 and presents a deceptive download button. 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=manual+for+canon+eos+rebel+xt PDF link annotation
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/xelilu.pdfIn PDF document text
    • https://sarixibaparuve.weebly.com/uploads/1/3/4/3/134382026/1186078.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://s3.amazonaws.com/libeganot/fakinakinalijivogawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3cde7c-becb-47b8-b8e0-72675b702912/12739855334.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/23190575164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60fd5f4-203e-499e-bba6-bf79d7ec5480/revonotomifomatukubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60ec222-dc65-43e8-a9aa-55c5181a7e0f/48448901494.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/mivivije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c906c5c4-0dd9-4563-85d3-3f8e89c4e82a/lexmark_cs410_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10640fc-b20f-4688-89a3-d2172a8740d2/78637994913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254d064d-ef3e-4d89-8208-7f57f1d59a1c/ximuvokewexusadaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc85ac00-2afc-48ed-8df7-17d224d3d112/jarlin_garcia_fangraphs.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/62118658775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29e8b7d-7f9b-4ab3-8272-7d52937f0883/21843383462.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAD 4924 bytes
SHA-256: 026328d4b23594d77f7cde78ac8f2c291bf165fad2afd73e592eb4d5b10fba0c
font_01_sfnt_off00007c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7C 10356 bytes
SHA-256: 3ac4ab55fda6fc2a0ca503218cbc4e8819fc2806052bd06c2ac5ff50ef70f66c
font_02_sfnt_off00009fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDA 20600 bytes
SHA-256: 9cf1305312414106ffbf5027e3deada4731a4c5b3b786bc860bccabafbe4d377
font_03_sfnt_off0000c22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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