Malicious PDF — malware analysis report

Static analysis result for SHA-256 d989b710dd7f514f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 20:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6998e5e00b0dadb33ec21e912406aad7 SHA-1: 39abed260a80a3d2e7e4a110b4bff31e4fd84e34 SHA-256: d989b710dd7f514f53249b6625d9e88ee737052301c8764a4db5b72e7f87eab3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing attack, specifically a callback lure, as indicated by heuristics and embedded URLs. The document's content, though obfuscated, combined with numerous links to potentially compromised websites, suggests an attempt to redirect users or deliver malicious content. The ClamAV detection further solidifies its malicious nature, pointing towards a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ketchas.ru/uplcv?utm_term=dr+enzo+abad PDF link annotation
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/xamevolavafatibegoko.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/wobevelas.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/75891938530.pdfIn PDF document text
    • http://asfalon.com/__files/file/74159541786.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/70799255572.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3a401d98e9c7e32a1fdf9e3777db4f2/xugibujekatuja.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7e826a4a---gidave.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6396c62d77---24654223093.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///totes.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/nelijabutul.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/83786656742.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/vusisasule.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/2255294855.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/46177792047.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/pulopofojun.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/15632773790.pdfIn PDF document text
    • http://haki.vn/uploads/files/55095807266.pdfIn PDF document text
    • http://espressoperfetto.nl/app/webroot/files/userfiles/files/83877108419.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/dunebize.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/rajajovopopazavoda.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/jawerex.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16129bd0730df4---gixebijemomubuze.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/abfc311819c8215359af6c063b368a4f/nezajeluxuxax.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_off0000d342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD342 18200 bytes
SHA-256: 3efe14dc4fc60192045b04f13860d3cacb78fa2dfce23f44cc8a36e0e50c49df
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 10036 bytes
SHA-256: 897ef34b664d1c2445dcb9e9a1845517bd5444fd962a6064846e0e8ba0e2578e
font_02_sfnt_off00011939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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