Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07a09c24dbfda4b…

MALICIOUS

PDF

73.9 KB Created: 2021-08-26 09:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b26fe4b2446c59e1d82b2f32c1cd75b8 SHA-1: 0b002e7c2de434dd9f1f3a6d829e5ed297a53596 SHA-256: f07a09c24dbfda4bdf8c5aa0033c392f8817d933c992b2d99d8170d285f86a25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to redirect users. The presence of these links suggests the document's primary purpose is to direct users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://smidgel.ru/uplcv?utm_term=baldi%27s+basics+in+education+and+learning+unblocked PDF link annotation
    • http://greatwalledmond.com/ckfinder/userfiles/files/68577544464.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/77086744643.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/92786754983.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/sekam.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/xekoditokode.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5hbes4rcaeg15govjal793qra4/nipofaponizelomaku.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/69582451521.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b96f2136d7a---fegukunanonunedunijuj.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075e85c6433b---63713253416.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/71655683443.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082df52b0507---xuvakijilapironesudazan.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/fasuweloreva.pdfIn PDF document text
    • http://premo.at/userfiles/file/5274533857.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2df35941---finajug.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/26342036230.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/tovesoboda.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/42645375671.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/85654953656.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/jicj4nnc5gfc9a4fkgb23p9o86/supisamexagaful.pdfIn PDF document text
    • http://domario.ru/userfiles/file/semavababupitojulo.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/velugositamiwenudojetidef.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/54273659208.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f8b14fad5---fibemosifig.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_off0000bf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF15 15872 bytes
SHA-256: cbb8bbe3c5ec9e5e8996423174bc43269c34641a51c1c9fcf0d3759de7e0553e
font_01_sfnt_off0000e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001000e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000E 10964 bytes
SHA-256: a809c3c7ec862a715219ac029631efd647586146d5d694702213d0734f7b4776