Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e68dac9c1c2f198…

MALICIOUS

PDF

73.2 KB Created: 2021-02-13 14:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b1b437e36ea522c392d0534ebe84991e SHA-1: c0487e576039ab7e7b3496fc51365397953b41ec SHA-256: 9e68dac9c1c2f1986687ece4844a2e32a2bffbab7aaec71ef202278137271690
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, many hosted on Weebly, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://crophysi.ru/123?utm_term=mark+of+grace+osrs+price', appears to be a lure related to a game item's price. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent to redirect users to potentially harmful websites. The ML classifier strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=mark+of+grace+osrs+price PDF link annotation
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/rudawagelu.pdfIn PDF document text
    • http://copyrightproblem.com/iphone_emulator_for_windows_pc_freep2pja.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/rozobakimipiguporiga.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/xabajarominimojije.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/heiheih/italia_dance_music_appropriate_for_school.pdfIn PDF document text
    • http://mainsale.info/purchase_order_expediting_report43pbh.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/zovasora.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/sefibene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirinito.epizy.com/gezafodugijomofetegejeber.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/maven-_failsafe-_plugin_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/risid.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/vovimawezosik.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/91034052696.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/31328634686.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_off0000e173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 5220 bytes
SHA-256: d688e1ca86e868d2c9cbc13b55fca08f1fc096612c7dac8c2c46f62f8af8d04f
font_01_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 10704 bytes
SHA-256: 6d92bf3685bcd059c73958f4f80b2039c74f7ef5dde9a3f4f9bc39b227a4a445

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