Malicious PDF — malware analysis report

Static analysis result for SHA-256 090e47640dcecb5e…

MALICIOUS

PDF

85.6 KB Created: 2021-06-27 16:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cf29ff744158f59be13bfa5ea9b2531b SHA-1: 3ca394257b9a9d31e5c62eabebd3e77149811130 SHA-256: 090e47640dcecb5e1375f8af884af8486fbdc9e6893e5cfeb7a08ada86704817
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, suggesting it is used for phishing or to distribute further malware. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=neil+armstrong+after+apollo+11 PDF link annotation
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/a16277dgkhm6o45ijt4nmfjkr0/gimopiv.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/abadfc1454e33c6c8ab664f2e4f4a022/49739849060.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3e803258a---berojerofupag.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2cb03af31---80561726788.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/oj2ut4njrosip2tmg0s9u3tqc4/tosagiluxajoxe.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/53971799c53359036ea2bf8209c7f940/puwutokujumetesama.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/7jdfqinlps5qlahbc5nos8o0fl/tinekumetupuponogu.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b616010a3---fugeramuxemavajazusunuvin.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c99b8b1cb7---24199875457.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/a7dc9c07eb28ee8e08be42e90e57b9e5/likunawetiz.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076669cb0f5c---4175462542.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb1682aa61---94845878281.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/121f32f21a7271aca393124290662cb7/71811362354.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bacfede85---ragegusenenof.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/kagedut.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/63bd310627e7b241bfe3c4a998c9f671/90450555497.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609228d011808---sagapepa.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8950fd4c536776457f6fa1b216ecf6f8/bugegixodasoz.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/nowifibimosavifub.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/8to04v3j0uod2crof8ie4t1l8m/wekevunujapitokemefe.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160863e6c2b63c---46671779459.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/46384064598.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/kaxevaxuzogejunuvugezuko.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 10728 bytes
SHA-256: a9c97d13a67ded772acd10f63c5be70ce1e9b1f7f9ca1bea1fb5486a72632fe5
font_01_sfnt_off000104da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 16976 bytes
SHA-256: 06ea2a1f041f041a8f25943b19c14d221b6c313e4893e26f63d3294db8d1dbb5
font_02_sfnt_off0001310f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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