Malicious PDF — malware analysis report

Static analysis result for SHA-256 33eb59e8cee01fcc…

MALICIOUS

PDF

92.1 KB Created: 2021-06-14 07:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 224b2f743a4c8ffaa6a47a996c3086e3 SHA-1: aef5e8b1953a7159c668eceb43444f3187cfa2b9 SHA-256: 33eb59e8cee01fcc722125b428d0eba53bc2599a134cd0ac33c759fca5518761
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/pbw?utm_term=shankar+bhagwan+ki+photo PDF link annotation
    • https://jebezowurexa.weebly.com/uploads/1/3/4/5/134576847/binizata.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/zukerexujipod-pixolodera-mebekujasu.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/rulum.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/a9e38f2.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/jonigip-roxot-puniwomofexim-tejudel.pdfIn PDF document text
    • https://lopadedabebaf.weebly.com/uploads/1/3/4/8/134897987/443806.pdfIn PDF document text
    • https://dexasarejujevi.weebly.com/uploads/1/3/1/4/131454537/11c2068a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_6044d2c748d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_602274a5ed9e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6027e4f7dd4a4.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/4c06021e4b361.pdfIn PDF document text
    • https://linefalaxig.weebly.com/uploads/1/3/2/6/132682404/12d89f90e03.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/3415223.pdfIn PDF document text
    • https://bunazavej.weebly.com/uploads/1/3/5/3/135316535/lofajuz_badamizugudigif_vuzajo_pevufekod.pdfIn PDF document text
    • https://furasawi.weebly.com/uploads/1/3/4/3/134308809/magunokuzulomewap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c4c447-15e9-4625-8986-cf0716142386/nufurokirumivagenamuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33554c19-5337-4458-9d3b-9879f7511cbf/resedafitajezirizirenow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0932d29-b7e7-409b-844f-71fc0f79d3cf/kejepirenonitakaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ace247-3e43-47a2-9c8b-586c61e242e0/search_bar_in_google_sheets.pdfIn PDF document text
    • http://vazexetuv.pbworks.com/f/lavarropas_ariston_av51_manual_de_instrucciones.pdfIn PDF document text
    • http://jifosez.pbworks.com/f/92554513568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6b3f33-60cf-47f4-94bb-6a33a950c41f/100_embroidery_stitches_book_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 3032 bytes
SHA-256: 9751734578aca8e276332370146a59f478a3ae4640c601ba6c74749e13dabb0c
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 5272 bytes
SHA-256: a4bd4ac159b6aa4430a0294f2d881c9ab0760503437ff172c13fc85b546b63c0
font_02_sfnt_off00011bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFB 10208 bytes
SHA-256: 74217589abf3997aad2a2751c3f07095a732fbb5b85d65ba6e98582abdf60adf
font_03_sfnt_off00013efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFD 16216 bytes
SHA-256: 4b63dcceb907b26067784de86a90bb57a56c4480e7ab27aecbd50a585305e51e
font_04_sfnt_off00015473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15473 3864 bytes
SHA-256: b9a2513ab8c45ef87768bc27a0c34f5c548608418c34e0ee3f9d7177d20b85ef

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