Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf80247d8e5aa29…

MALICIOUS

PDF

88.8 KB Created: 2021-09-01 05:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a00b3f5b9b6546a9abcd38d430db622c SHA-1: 3ef444f667620d4b3e49ad6c74daed8090fcc954 SHA-256: bbf80247d8e5aa29d041f7000fbc8dac252b2d68540be528fd4d33262adba443
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It also functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains. The presence of embedded JavaScript and the extensive use of link farms strongly suggest an attempt to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=get+famous+on+tiktok+for+free PDF link annotation
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/39hqce3fpdara942kfmc4balqr/fenebajefediwomuwenopitiz.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5771c727f---xurefisusuwu.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/99724252564.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/fuvol.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/74716392033.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/1e11b4ea743545dc0af4f6f4d619e604/40378423989.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/kedaribekifamedogedopife.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/25786970057.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/ziligifid.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cvonismklje6at1b33q4bumv04/26366099576.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943b684d5f6---xudez.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cj8eloca1mcilqvkh8ftlmjju3/gimegipa.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/xewoterogub.pdfIn PDF document text
    • https://matrixx.lu/images/juditoguzimipifegirim.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/foevree0991erahl1gfeu0j04b/55283689978.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/jiberekasu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bafe279dd7---mopuluko.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/43359059988.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/jonamamusikipukisitusomo.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/36036791235.pdfIn PDF document text
    • http://allasclub.com/campannas/file/tuvibababemixurufazoxig.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k0ghmgsqb0vgivb234932pbq93/nulabuwipadujekako.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/duwexuwowofuvumurojofur.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/95846422343.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_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 19104 bytes
SHA-256: 06faab480a840947f7f8391380dcd151769b14ee3320361fed381fb560af6cfd
font_01_sfnt_off00012459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12459 10560 bytes
SHA-256: 674e2cdd9048b707b6a2170da0f4f257f1a012f06d750c0bc2dabf55abb428ed
font_02_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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