Malicious PDF — malware analysis report

Static analysis result for SHA-256 118cee80ca44c046…

MALICIOUS

PDF

70.9 KB Created: 2021-09-27 02:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5d129bf35c9d6085c77f7ffb3ed005f0 SHA-1: 1c8acbdde98fa80824d426d2abdccca0bf706ae8 SHA-256: 118cee80ca44c0460bed8ca7056ee4ca4456a2426165cd6f35f5cf14081cff83
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to various PDF files hosted on potentially compromised websites, suggesting a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • 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.
  • 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://putzlappenborner.at/editor_up/74397952527.pdf In PDF document text
    • https://pomtco.com/technical/files/file/47535143958.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/40844657170.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/fazunimiwikaze.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/lalomufe.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/kidinigogivifa.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/vaxugowube.pdfIn PDF document text
    • http://15881588.com/ckupload/files/91083885986.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/kubikoko.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/obv27r5lc8v8l0hu8979lttise/67781079132.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/95432728932.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/volosadajixufolafofufug.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/18162556043.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/11070078562.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/a4aa026e11ced4fceef33b6055a30b16/39418680452.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ki14m8bgu0gmpuvamij66hivta/73291619688.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/nuzela.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/jupabuxapel.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/52311979895.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/wizupedogukokuluxatesavoz.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/59259551629.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/kojovarulujakerenaw.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/tipefike.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/kapoxenobatesimuj.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/kuxurinugurubusukax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ac+market+download+for+pc+windows+7PDF link annotation
    • https://mediaget.com/userfiles/files/fufovinofobetijoxepo.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_off0000b201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA18 10992 bytes
SHA-256: 5688736f8e362694a5c658ee7e3d7fcc94f2844f125fea1818a4a264eb2a55fc
font_02_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 16388 bytes
SHA-256: 190fd1efcfc3f6d4d70b8b766603fa7b9c206a3763055faf47f9f4f267042644

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