Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e32b62f4301b2b5…

MALICIOUS

PDF

89.9 KB Created: 2021-08-02 19:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: c632a9a33ed49039001ff6f3ef53f7fe SHA-1: 6d5b61f11af3524bff98cafcd5d4ed123543b9ed SHA-256: 4e32b62f4301b2b5bc5340418a68cb30b19f17b97a49cf346a48de180d2af0cf
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/55vmbfkdd7pk709fi8b8rp38vj/66644254763.pdf In PDF document text
    • https://taevlingar.se/images/pages/file/refodavanita.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/86760282226.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ddfd7cb38d2---57355766834.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a427faa828---tutifuxaxozoligedefoz.pdfIn PDF document text
    • http://kag.fr/userfiles/file/8732021294.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f7e42feb3299f4f8d846933412df2eff/5526901886.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711c9442b2e---42268364832.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160825815002ae---nepox.pdfIn PDF document text
    • https://vieclamkinhdoanh247.com/upload/files/39948596196.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/fuvazazeritapigaj.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/bupajebomazesilam.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/sifimikutejazegawamida.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e11622bc---wetud.pdfIn PDF document text
    • https://zzwgjx.com/d/files/dajepijejimadakejifemuvo.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e50a10e3f35ba21083540c4963f9cf02/88423574531.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8863c5fdbf---162956924.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/98163935881.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/vosebvf9bemv7qs7vjdislfm05/99227746031.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/guzapezutor.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160737e70bc7cc---86107202471.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e15a38bd91---30286301359.pdfIn PDF document text
    • http://tyextractor.com/d/files/44984032741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hotel+rwanda+full+movie+download+netnaijaPDF 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_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 17256 bytes
SHA-256: dd6f8dc8b66d9d6684b8db04d83412318568a282d0da567b07b6eda9367ae02e
font_02_sfnt_off0001403c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1403C 10720 bytes
SHA-256: 58df441c7d125b0ee58eaad2ef2f9088cae451577d4a6827f8eb3ae0e06b17a8

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