Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b6e3dc1b3cfc9c…

MALICIOUS

PDF

48.9 KB Created: 2020-11-05 17:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fc8c0a8a17b28d70248b1f086a1d2412 SHA-1: c8d996ec29dba4380e6516674d1312a50e4259f1 SHA-256: 11b6e3dc1b3cfc9cd3969a288f1dca91c1fa1bc682a0a36028da5ae23d671355
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary links points to 'https://trafficel.ru/strik?keyword=simpson+maker+avatar', suggesting a lure for search engine traffic or potentially malicious content. While no scripts were explicitly extracted, the structure of the PDF and the presence of numerous external links indicate an attempt to redirect the user, likely as part of a phishing or SEO spam campaign.

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://trafficel.ru/strik?keyword=simpson+maker+avatar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87192d8d94b.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/nawegawewojar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f9b9919694f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5f8e335f4e8c6.pdfIn PDF document text
    • https://sixifemawo.weebly.com/uploads/1/3/4/4/134470876/ragifilixokiverekaba.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/8177988.pdfIn PDF document text
    • https://tozupefiga.weebly.com/uploads/1/3/4/2/134265365/gofekidujenizu-bopuwatu-gubarulime-nedefenosegavox.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/1bdd0cab-32ee-46f5-99cc-3fdecbc3c48a/ejemplo_de_proporcionalidad_directa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9712ccea-67e0-4b42-8be4-2d31acec6dc3/61225460762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c934b7-aedd-4cff-814e-38152f8e4cc5/58538437356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a07e25-b888-491f-9dc2-60b13f43ad69/vista_landscape_lighting_led_lamp_t3.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/livanobuxozuxoxumuro.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_off000064a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A1 5160 bytes
SHA-256: 78676ca0dad8f0efe681ef4162f540b0d9172464b440fb0fdf352514bf6cc663
font_01_sfnt_off00007611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7611 1852 bytes
SHA-256: 5ae1d259d034084be61ec780dd0ff4f7394a348651cf58c8458f9478dd568280
font_02_sfnt_off00007f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F01 10000 bytes
SHA-256: a7e538b6dd92c8431fb9e6e185e4c9b7df8b028e33265f56c7e20abcc20d70dd
font_03_sfnt_off0000a16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA16E 16168 bytes
SHA-256: bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86

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