Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0bdd72d4c25550…

MALICIOUS

PDF

84.0 KB Created: 2021-09-08 21:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 751e67b5175b9a247a5ff9204169fc99 SHA-1: 77c8ae370c9729a54511dbece47c5b78a1b29628 SHA-256: ce0bdd72d4c2555044e6e3faafc89b8b9e9f93e5bf79fce6817929abe60f39e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content, likely leveraging techniques associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://venkateshservices.com/uploads/tojatanixabu.pdf In PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/9531687086.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/wazalibojijozewu.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210907232903.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/dupexisaruwotazo.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/zinonedonubobubomevupom.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131dc30c092d---45598600543.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/saremofiwazu.pdfIn PDF document text
    • https://norservis.com/files/files/46525302863.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/tejenapemakagiviw.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/mepufajujazizuwori.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/vozaseta.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130276a51608---majupok.pdfIn PDF document text
    • https://camphacement.vn/upload/files/55411688925.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210906122323.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd9e193417---91440279079.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/bopolivumulaw.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/denojuxanatuk.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/susosodaluvupiburu.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/55358284250.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/66517509583.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/99891853620.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/dedowaw.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/rafumejirilibedimulax.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/53298952157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=english+worksheet+pdf+for+beginnersPDF 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_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 18628 bytes
SHA-256: d9d4b4fd0ad99130994de18580e4ef62df022cef3c22efbbc96f2d0ccb3131bb
font_01_sfnt_off0001115a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115A 10916 bytes
SHA-256: 4334aab3b14738a751a2cdd4e41a9ed1883db1bb3d38c271973d14ee9e203f37
font_02_sfnt_off00012a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.