Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a49e7b84e64027…

MALICIOUS

PDF

97.5 KB Created: 2021-07-22 18:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1d701f02073e5cea6e2b5a72c29cfc0a SHA-1: d1213bd34484059c7ab934e68937ff925ffae0f6 SHA-256: 64a49e7b84e64027db17ab7a1f9450616745475bf506d0da3cf0ed0d2f34d06c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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 http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jupaserijunigaxozawitiw.pdf In PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f93a95208d---gixufale.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/23d79b58f8cca079261ff618245a21e1/mojixifajifekujon.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/c2b1jutfcfm6m3nm8kd8kr4cb4/wogug.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/15700412515.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/sejekuxugipiduxoli.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/wadukaloxolozudelix.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077a27a37018---konifewibiw.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/vinisapudixuzoj.pdfIn PDF document text
    • http://fedoro.ru/upload/file/78682473485.pdfIn PDF document text
    • http://bakoca.hu/files/file/17134713595.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/miluxavezilabugapew.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/cd09929ed0b9577427a15f2fc7eb86e5/runuj.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe2715665b---xejadirunuforo.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbac7132fd---maparedij.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/kolage.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/29666037443.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/tagetarujalimubumabevo.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/popatakesig.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/bugubo.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cc7a1775c---fibada.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/05om7m3oma7blenrhrp4d5hn11/23404306124.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/88718351465.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/c747f248f094f9971ae893cd05258464/30840259467.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/dipidowuruduba.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071ed2eb1ebc---difewoduzinodobewovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=storyboard+for+video+projectPDF 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_off00011b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 10820 bytes
SHA-256: be71e025416a18cdd86d400b2a9b080ce932a6af2a59fd5202425b5e882e2457
font_02_sfnt_off00014c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C47 16992 bytes
SHA-256: 9e334caf07f612498b2eae19f97785d22f0b8fa0653671ebebcb9bd785a0dd2b