Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad34c5633d3ea6c1…

MALICIOUS

PDF

80.4 KB Created: 2021-03-30 03:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cf63be23dbe0808a0802b1a93e06f0d5 SHA-1: 54ffddd3d5a9c7439140b93bacfae42244909f3b SHA-256: ad34c5633d3ea6c148e6a61fc16cd2b7fbcf9add1f428ac5cfbcca8b7a58e7c2
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or SEO manipulation tactic, potentially leading to further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/wix?keyword=toyota+hilux+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/nuxazagugura/jhgejjl/79713625108.pdfIn PDF document text
    • http://vuwubukozefiwa.iblogger.org/dell_ultrasharp_1704fpt_17_monitor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuterijoze/77509546784.pdfIn PDF document text
    • https://b595a6f9-6bcb-48d8-acfc-7cb8c696cf55.filesusr.com/ugd/21f311_daed99befbe84e368a95aa4f25dbea5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9347660-3002-4715-b596-040fd2934d8f/tonibibeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad3701-28d4-4a18-bad1-31e83d0646e0/what_is_the_cash_flow_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c0912e-7d85-454e-a095-ef664048448f/28475369892.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/88908740152.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_001f126ae1204592911d2e3f517033d2.pdf?index=trueIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_6ece50bdf9db4c4690cfbb314fb0097c.pdf?index=trueIn PDF document text
    • https://14e2190e-1c7c-401b-bdd1-4e50d95f8180.filesusr.com/ugd/62a579_3dcdf3a8a2624df2ba465728910c5896.pdf?index=trueIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_cc24cc2e1eea478b94d7a377984bb99f.pdf?index=trueIn PDF document text
    • http://rikovaniroxatox.rf.gd/fulaxukodapamapefol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5910ea14-c72d-4ed3-b75c-5d8876a25f33/first_alert_9120b_beeping.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_5aaab843f15044a5a8123b461a2f79ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/team_meeting_agenda.pdfIn PDF document text
    • http://vebegab.rf.gd/beginner_tai_chi_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772bd281-99ab-4958-a9a3-6c07c969649b/70529368623.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 4888 bytes
SHA-256: c4b130c649454762f556a2bbfe3f4f848c96530db4dbb174209edf70fa4e92f7
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 10828 bytes
SHA-256: 6ba7ef17c5b2666218b29dd02750b95e99b5e87a142ef6a07fecbecb8787116f
font_02_sfnt_off000126ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e