Malicious PDF — malware analysis report

Static analysis result for SHA-256 049fbe49410fd19a…

MALICIOUS

PDF

40.8 KB Created: 2020-11-05 15:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 08340d42cd6082e8abba80c710a17bc7 SHA-1: 29fbd8f573f84ae4af05455f9a39fadb8260d987 SHA-256: 049fbe49410fd19a9c257db2f6a85704a16a1ce08d410abc1173c77837002fbe
96 Risk Score

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://trafficel.ru/aws?keyword=regimental+fire+and+fury+rules PDF link annotation
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/dalud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5fa32f274bace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f8964ff663b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f9c2159aa340.pdfIn PDF document text
    • https://rilofope.weebly.com/uploads/1/3/4/6/134630674/3565257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5f9798163d036.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/xarovimati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8fb23ea56a4.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/suxiweke/airport_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/nedomutujelema.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/safutozemimejituzidofara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049dfc83-79d3-423f-a4cb-acca94b31e89/chili_vs_chile_pepper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb49229-e514-4820-a01a-3d54e158e2fb/46981178218.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_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 5336 bytes
SHA-256: 81f63f71e6a9414d495cbcf96fa9ee72fa0cfc3ff66abb01a964a9f024da6cca
font_01_sfnt_off0000743c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 10196 bytes
SHA-256: c7917ab69840a432e90c2df4942a108fed1225f1f15060f0b5538684c7dd3944