Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a5958e74b0eccf…

MALICIOUS

PDF

73.7 KB Created: 2021-03-01 11:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: baa42865ec553e6cef403003f3920b4e SHA-1: 8703bfbe96fd3634cc0503588c82e35c1fe7f116 SHA-256: 26a5958e74b0eccf11a6788bf32fa168e3e2d61451f7fd1d94f7418bd3e7bd2d
186 Risk Score

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 0.9995

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://crophysi.ru/strik?utm_term=el+nuevo+houdini+chapter+2+pdf PDF link annotation
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/8517793.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/hdjhbqH/sling_crossbody_bag_purse.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/rilusozopes.pdfIn PDF document text
    • https://jajirasib.weebly.com/uploads/1/3/5/3/135394010/dusolasiduja.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/1443800.pdfIn PDF document text
    • http://tubezadobuzaro.66ghz.com/carotid_plaque_treatment_guidelines.pdfIn PDF document text
    • http://hotita.space/ornament_and_crime_manualel6cl.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/aRjhKFI/kesezifosinudanutuwumefa.pdfIn PDF document text
    • http://cyberghost.store/420894492385b0bl.pdfIn PDF document text
    • http://vesibigezedenu.iblogger.org/dozifo.pdfIn PDF document text
    • https://tuzejaved.weebly.com/uploads/1/3/3/9/133997948/gilevaluvokogosut.pdfIn PDF document text
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/4892697.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/jghjQge/dog_mods_for_minecraft_1._7._10.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/wewuwawexavita_pojaterovadut_porezupalipus_zidoberadam.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/dGIhgfJ/agar._io_bots_no_download.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/powawegoguzor.pdfIn PDF document text
    • https://cdn.sqhk.co/gisefezuzif/2bRCMjh/5716157848.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/multinomial_logistic_regression_spss_youtube.pdfIn PDF document text
    • http://osthondroz.com/wepiwilamimrt3sc.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/miselonikufurezasolu.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://wagasegupoveduv.rf.gd/mimovutotujupulilomek.pdfIn PDF document text
    • http://segixiw.epizy.com/55803409402.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_off0000d563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD563 5096 bytes
SHA-256: fc24645b05310cbac4d4430b2827b709cc647d9bff1b2c1a414fc5d78eb592c6
font_01_sfnt_off0000e6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 10312 bytes
SHA-256: f0887de7a9e630c80d4cb8eb30b8c562ecbbb278a74c3eecc960f2de5f017fa0
font_02_sfnt_off000109fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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