Malicious PDF — malware analysis report

Static analysis result for SHA-256 e633c623661f5aab…

MALICIOUS

PDF

42.4 KB Created: 2020-11-07 06:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 100a900bcfb2f6dcd1b69c59e3c67e74 SHA-1: 9740a50f863ea9de7dbdd2a98f24d922865223a2 SHA-256: e633c623661f5aab865833f51e30dfa403b87cc1f50302d5e5684ece9c385255
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://traffine.ru/aws?keyword=roku+tv+remote+apk+download PDF link annotation
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/c6430d.pdfIn PDF document text
    • https://sevebara.weebly.com/uploads/1/3/4/5/134501605/7055894.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/badefuromaguxupadipo.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/3793514.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/vavebufevodutob/dafixepuretukigufep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c82b09f-dc8e-4957-9e71-b94b425c46cd/ehome_america_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f4ed24-72c2-43d7-a96f-c05c2d864a8c/wujegedofojizesipe.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/act_2_the_crucible_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e02341-0d2b-4c1b-ba03-39610960a34a/hearthstone_witchwood_guide_toki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4208e0-4cab-4fe7-8825-c37ed311687a/calhoun_middle_school_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4b9c28-26f8-4667-9acd-2264d13b574b/47363701272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263c6f49-e56b-4a26-9822-4560efd85203/diporefix.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_off0000678a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 5148 bytes
SHA-256: 12ab2713d794567271ed11471cdf084513dd435abbb555b8aeb0452f22285c2f
font_01_sfnt_off0000790f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10448 bytes
SHA-256: 6d4b28bd30bed1afe97889da027f938c53c55bf4c6f6c1116e9b49055ea01012