Malicious PDF — malware analysis report

Static analysis result for SHA-256 3395afb8cac13e41…

MALICIOUS

PDF

81.3 KB Created: 2021-04-05 00:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f3f1ab619f8ee4e60e7edca853babb6 SHA-1: 20682c48a192dc4bdfb26c64f201bead09609c77 SHA-256: 3395afb8cac13e414e703e5cebd8d93db140d1efca53e6c8b051d8619be3f905
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9997

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=hamilton+beach+toaster+oven+easy+reach+manual PDF link annotation
    • http://pewujok.mypressonline.com/27392178683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_5fd10e06b19a8.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/51134523086.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/xojijupajiro.pdfIn PDF document text
    • https://rovinimowi.weebly.com/uploads/1/3/4/6/134682499/8151709.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/wuxasitufowoz-fusorufikoviwu-xewiri.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/arabic_english_holy_bible_new_king_james_version.pdfIn PDF document text
    • https://vulakesekek.weebly.com/uploads/1/3/1/4/131438428/9507030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_602223df0d6cc.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/21120476346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_5fd85cc1e2400.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/8416307.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/healthy_morning_smoothie_recipes_for_weight_loss.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_d8812b3cb3bc4bf68f7dce6d6ece62ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/582d85dd-17b0-44f5-b375-cbdb461be95d/5477088883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26dca7a-bc24-4ed3-8df7-3e625a8d9445/67038501322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192e824a-ad09-4a2a-af31-be88fb6cbff4/how_to_program_a_viper_7756v_remote.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_3eb57a3e69464d388f36ae344860843b.pdf?index=trueIn PDF document text
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_867f9a60963a434c83cf786c66c5857e.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_454a943d9fcb48349a08a6c83bb9d149.pdf?index=trueIn PDF document text
    • http://pidodexogejax.myartsonline.com/sovidagedugenuligotin.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/camera_obscura_history.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_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 5304 bytes
SHA-256: 15ee8e4ff879f915a44105b425ca230b523ce7842d40131a4e1bff57058e6735
font_01_sfnt_off00011339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11339 10688 bytes
SHA-256: 9f004a830824a3a7b4934e9cb4ccd79a69f8bd2af783e56d31cc5f57b1bd0867

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