Malicious PDF — malware analysis report

Static analysis result for SHA-256 0960b9ba920f36e9…

MALICIOUS

PDF

70.1 KB Created: 2021-10-03 02:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aaca474ae95becfb3ca0141d3a546249 SHA-1: 8584d23beb7b6a8cb343a8e726c6ff4db0233515 SHA-256: 0960b9ba920f36e9d93477828e94c254341aa15d7579eda80518f24d76513ca8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=felonies+that+cannot+be+expunged PDF link annotation
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/57309938422.pdfIn PDF document text
    • http://innotack.com/userfiles/file/didadegigulat.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/45321354218.pdfIn PDF document text
    • http://theblare.com/image/upload/file/96955930311.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161474363a6dba---digux.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/nexuxapuz.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/fawotaxo.pdfIn PDF document text
    • https://staging-info.sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/fojedulinujebekaje.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/76508523235.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/65038575855.pdfIn PDF document text
    • http://unsersohn.com/images/file/roxofelaro.pdfIn PDF document text
    • http://benly-carson.com/product/files/2208635746.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/9698527479.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/75712159579.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146c44c70b31---42405414065.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/61354286918.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/pikajutiwiralewob.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/65685018802.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140afbaa5ed6---kalasukuxo.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b9d6ae47eb---22449191613.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161572e71d9bab---tuxupaguxopolupuwor.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/nevuriwakuxukagosuwupa.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/bakupabu.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/tumux.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-24/20210924161234558642.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_off0000b1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BA 11012 bytes
SHA-256: 4e4fd455a576cde6c4a80e3f5fecca16c7dfeb57a868174ba36117ebc51cbf7b
font_01_sfnt_off0000cad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 14940 bytes
SHA-256: 60291e92ac09b9ee879dd8e49722e6eb4383f82e43e0ded2e32537b30970d94b

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