Malicious PDF — malware analysis report

Static analysis result for SHA-256 496a2ff9a44ae73d…

MALICIOUS

PDF

74.7 KB Created: 2021-09-17 02:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48319f30d9eda653b23f4f6defe1f021 SHA-1: 9c1a65526cf899e0b08384102cdb62f3a63012e7 SHA-256: 496a2ff9a44ae73dc3b4aa63644b7bfb1d6493202512030fa50646e7f1ce2791
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a malicious PDF detected by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure impersonating cloud document services. It contains numerous links to potentially compromised or disposable hosting sites, suggesting an attempt to redirect users to malicious content or download further stages. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://edinburghpools.com/contents/files/pifozejase.pdf In PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/9982840264.pdfIn PDF document text
    • http://precisao.net/files/files/37190328948.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/marasaguvinegejut.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/90015393759.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/nadogipotobesedefovala.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/94130348792.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613613b29ccbf---jeregitewovuziz.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/70239203139.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/60124264120.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/90604653216.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/bubelamonojaxonu.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6694bf89d0c7955f37819edc428ef201/58591820567.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/dedurudogonadaxowipig.pdfIn PDF document text
    • http://furniture83.com/upload/files/29193051131.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/xekiroluxubowalilaxepuj.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/39105266902.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/81657010526.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/sifazamikalavivuvomoj.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/webixedemixugizepusug.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/mupiligudopero.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5e53c34c1---nusunu.pdfIn PDF document text
    • https://afayl.com/userfiles/file/zaxuroverakojipunufa.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/95467998001.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/zigosutodabaradewof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=edu+365+loginPDF 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_off0000bde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 10320 bytes
SHA-256: 024c9c081ba8864c17994c1e388ac50d64ead69582d3d9baafe440707c6b2591
font_02_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 18696 bytes
SHA-256: 02494a6824f034964328fe4a9af3af4acd4bebd0f7812c5edcf4df6b8ba3269d

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