Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da0e889efd54b8c…

MALICIOUS

PDF

83.0 KB Created: 2021-01-23 12:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d835efb9220548cc3be7d61d6f17d179 SHA-1: ee77d89af1ee74f248d5aa5c64be5793a954c4d5 SHA-256: 5da0e889efd54b8c11787b8a8fcce27cbd3b1be04c8f329b0ad7b21aafb5e9df
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware downloads. The presence of multiple disposable hosting links and UTM parameters suggests an attempt to obscure the true destination and potentially track user interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/aws?utm_term=achcha+wala+video PDF link annotation
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/zazegagenadal-pifufobaxifefuv-luwojapi.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/1246650.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/gfhdjhc/52625733190.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/lixiruwelivilet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_600a6eb987bd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_5fc9d0cf026be.pdfIn PDF document text
    • https://fojuxiwo.weebly.com/uploads/1/3/2/6/132695505/2306772.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/2a426ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413843/normal_5ff7162701c7d.pdfIn PDF document text
    • http://gofipupeseg.22web.org/42329595822.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/jegokuzanizaf-warokowutadunon-demozirabe-nefebejeline.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/nogugelu.pdfIn PDF document text
    • https://zuzumapi.weebly.com/uploads/1/3/4/3/134344149/8255765.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
    • http://fedorahosted.org/lohitIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 4496 bytes
SHA-256: 16756e99cb9a6853b899b76cca626450c496168e5eefffc7ab14b42d5603d215
font_01_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10852 bytes
SHA-256: 82026fd7f2072d6b809faa3006a51ef9aead18d0813c3a574a871ef3c38750a9
font_03_sfnt_off00011846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11846 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_04_sfnt_off00012645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12645 7028 bytes
SHA-256: feeb2238a70cdf19377dfa68e327b7580e696f66949eaa4198c6a68fdbdbe5d1

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