Malicious PDF — malware analysis report

Static analysis result for SHA-256 f567b0ad6b8ea74d…

MALICIOUS

PDF

67.7 KB Created: 2021-09-26 01:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0dbfb11e0dc0607cd9f9f553645c076a SHA-1: fbb21ca969e49ad170873fb08ca02e99037e50f6 SHA-256: f567b0ad6b8ea74d72bc8d73de75a0be7a4877e135f4f5551bcf19ca10619274
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to download a second-stage payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://narcisse.sk/editor_uploads/files/banulibemobawitokakade.pdf In PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/fb3785f7a65d4347ef82bb3775d82096/56320649961.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/2dd22673f7dce42ab1ce9aa230b49476/39529233505.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/masimebubuzidafe.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/majovevosexowatibukopekik.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/65258723448.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d1e79eda418fd5a7ae5d459fa3432eb3/41000973799.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210909193853.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/xelojapitekafufelosukolum.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/2t3iuoi6gs3h3aqjqlfde946j3/walana.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/9147943116.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/47060159752.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/23412551078.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/piwedimix.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/79481851035.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/bojerojulubelologevuzapi.pdfIn PDF document text
    • https://eastshop.ir/data/file/lafulese.pdfIn PDF document text
    • https://yilmazlift.com/userfiles/file/81188788632.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4249b199c---13802922507.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/43322562187.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/j2bimlgu1p7l3qk3k0b7hs9p8l/31287800818.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/13ddhfepaurgvvk8uh9lpmon70/2070812427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=watch+ice+age+online+free+2002PDF 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_off0000af01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF01 10680 bytes
SHA-256: 926625fcbea2177f033f59642fa415ce5d8047d5af9a5540af4d07221ddd745e
font_01_sfnt_off0000c783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC783 13792 bytes
SHA-256: d33ebc3339267a89d5401f667acab85d91a555b4c5f9bd35d74029e7f0cf7369
font_02_sfnt_off0000e998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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