Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bee44c54c2d288…

MALICIOUS

PDF

121.2 KB Created: 2021-07-26 20:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86bc5f91c2355df4b0d3dd347720366b SHA-1: fcc6ac478bef9bb26af045173baf76894f8958b5 SHA-256: 02bee44c54c2d288cebfb1a2cb0c4a853b8f940dcdc9e3fb94b96fc469914a31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. This structure is commonly used to distribute phishing content or redirect users to malicious sites. While no scripts were explicitly extracted, the PDF's nature and the heuristic firings strongly suggest it's designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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.
  • 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://akicgiyim.com/userfiles/file/lefufanowukedesabefe.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077605a9d7e7---votakex.pdfIn PDF document text
    • http://waltonjohnsonfamily.com/clients/870437/File/wezujapoxazodanawinurum.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/2114479553.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/9e27eb17ef8e159efc3bf193aed96838/bibuvafixoli.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093f55658f6e---welajiximax.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/37885350858.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210714_150921.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/90475601155.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e81ef1f1e13---13807570120.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qlgvc40d4kvp8dss3nu3mq98uo/86839696584.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59fdd8c63---10079232546.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/60583478032.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609d689750ca7---wuvesaj.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d8d0cf0e90a70534d69259e1840bc7ad/dirixorinabojubidokeda.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021429256548437.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160718dc022fae---kikakevuxito.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ae30929c0602765b0280257b42217739/86152689291.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bcc052a1b---69380698417.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8b230eb7ae2b091d7dc8942135c4aa6/40046142592.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/bavag.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/pkla9b37hqphovf5rftsbviroj/rexinal.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/letedivu.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/jufiguvada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=monografia+psicolog%C3%ADa+forense+pdfPDF 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_off000170e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E8 19572 bytes
SHA-256: 8192e12740b0dca0dbda7fa91343aa0828dd7f60bf900f18cf6d778d192f6dfa
font_01_sfnt_off0001a37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A37A 10752 bytes
SHA-256: cfd4050b3ebf7c5d915143a5db652e4b1c2de554845204011a2b74457ba0d6e8
font_02_sfnt_off0001bc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1