Malicious PDF — malware analysis report

Static analysis result for SHA-256 34de20a3eeccb5ba…

MALICIOUS

PDF

82.4 KB Created: 2021-07-14 07:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 393f52e060e906e0a892b2e0fa97dab4 SHA-1: 458e019489bf066e60bf868bed8b9f2e54f8531f SHA-256: 34de20a3eeccb5ba5e3f459050875c42f520954816d53f5885ced9c8e137c7c4
164 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the malicious intent of luring users to download files. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier output confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/7db2d3237e77ac251b199eecc426266e/doterob.pdf In PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/litunifimabubiregazaja.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/964d890648761c3de908ac1f87db8a66/98418825770.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a20977e0---farojabofixegiza.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/85822924802.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/koleziwavofisam.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/2782850293.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/bodobisesufebudo.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/84363374928.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/16dvmq7si63hulccm8v97oakfe/9948919544.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/75af4e9f273fb3b682771f4db9e82733/likedafurilamazuje.pdfIn PDF document text
    • https://superchills.com/userfiles/file/65343083089.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/regetopujojegunapezix.pdfIn PDF document text
    • http://ezibra.pl/upload//file/28309893750.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607238a3531cf---mupowunurusoxikawetaz.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/67183900800.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/64921706468.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfc7731471---44567154940.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160914c6ea9cce---tegil.pdfIn PDF document text
    • http://ubest.ru/images/file/73603924458.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/98522127152.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/57691471675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=link+to+pdf+in+wordPDF link annotation
    • 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_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 17084 bytes
SHA-256: ea98c275543bb836db4178656eb61b9a7b35f426e01b9880bbb042e4db873c6e
font_01_sfnt_off00010e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12622 10116 bytes
SHA-256: 8476e35f4f4d6da48d47b616f2986716f4486eab0da101c529856b701a287d6a

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