Malicious PDF — malware analysis report

Static analysis result for SHA-256 c450e9395086300a…

MALICIOUS

PDF

86.3 KB Created: 2021-03-08 03:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 99f14feb260807838e819336daa1e1e0 SHA-1: 109c0ce3a45c1ddb6c5928e05d0503392ce384d4 SHA-256: c450e9395086300a221d4cf2b2681353a740e48378bd759e3e6d0b40d0835d5a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least one identified as potentially malicious. The document's structure and the presence of many external links suggest it is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

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://dugedepap.ru/wix?keyword=mm2+tunnel+guide PDF link annotation
    • http://ginumon.iblogger.org/telugu_chalo_dj_remix_songs.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/9071802.pdfIn PDF document text
    • https://lazimepirurela.weebly.com/uploads/1/3/5/3/135350713/xitupeja.pdfIn PDF document text
    • https://wovinimupilof.weebly.com/uploads/1/3/1/4/131453577/pupejumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fe43c7d6e9d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370074/normal_5fc864da45ca7.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/195a64d7-d578-4cc6-9024-2e953d08b678/char-broil_commercial_tru-infrared_stainless_black_4-burner.pdfIn PDF document text
    • http://tilukonera.rf.gd/69538063217.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_fb9878b1c6a24063b52b0a8ec87cb552.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2150c1-a9c3-4f7f-a886-29f05efaba98/kandi_110_go_kart_parts.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_95428b2c19fb4c23bf17f2927d597635.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_5c4d6b4347234961bd20e249f0c2ee9f.pdf?index=trueIn PDF document text
    • http://lubudag.epizy.com/zoxufigis.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_17926f9d619347cdb6d291d23ef86738.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc7304a-3086-4a11-9d5a-32c744ccd389/38994934707.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_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 4796 bytes
SHA-256: 349f9e7adc96659a86fd608445b441fcdff8094bc8ef0a89647485bf8a5ea0b9
font_01_sfnt_off00012846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12846 10624 bytes
SHA-256: 1bc1636df22f8584d22167f83784797bac4037db01c2dbdeceb6e68051c6d6f1

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