Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b535c7a96cddfd5…

MALICIOUS

PDF

44.4 KB Created: 2020-11-05 16:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39f46523f07a6be0c24b603f5a94d9c2 SHA-1: be1af30acd30fa1de84f7cad538c8538171842dc SHA-256: 1b535c7a96cddfd5ece85fbbab943c368d973f73d614f2d26e866c77689c7e49
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on file-sharing services and appear to be part of a link farm. The primary URL, 'https://trafficel.ru/aws?keyword=clash+of+clans+hack+download+pc+free', suggests a lure for downloading potentially unwanted or malicious software. The ML classifier strongly indicated maliciousness, and the structure with numerous outbound links points towards a malicious SEO or download-luring 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/aws?keyword=clash+of+clans+hack+download+pc+free PDF link annotation
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/muwalisoxomaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f9e5dd895584.pdfIn PDF document text
    • https://direfuxapiw.weebly.com/uploads/1/3/4/3/134371974/7983637.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/ebd2dd66f69ebd0.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/fa1094c9-5be1-447d-98b6-6e9cf39f0563/7421970776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9351b4e7-b111-4ae4-923f-a7033c200fad/63597406634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3953de8-a0a4-4e64-b1ae-86195748f1bc/mefulumipowuriro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb35a6e5-b04d-4e72-bb52-abdc3e474d1e/ejemplo_de_conjuncion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f69989-ad8d-4e9e-8783-f9f1ff33e1d0/56913049579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7405024a-c4e3-43ef-bcd4-190a8f3c5e83/81016175152.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_off00006ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 5304 bytes
SHA-256: a37b2b6b66ea924b62c93f0cb1589a936fa6bc3b12253f463b7cd7542e361211
font_01_sfnt_off000080cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 10724 bytes
SHA-256: bcb03b3a3180ba0499763c509b7c25ec53351a783fcb124f568bae0fd4c74ed8