Malicious PDF — malware analysis report

Static analysis result for SHA-256 563f6f84482135d6…

MALICIOUS

PDF

80.2 KB Created: 2021-06-29 17:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d82286f738e260d5f22955c80424aabb SHA-1: e6490dbdb3fe1764266b2d517be6b8f0a9b160f3 SHA-256: 563f6f84482135d623b39663ea7b009b83e2c13a22dd15232727dd87de803101
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://africanresearchcenter.com/userfiles/file/79393177907.pdf
    • http://araonline.hu/uploads/file/26620177626.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa360e913da---papot.pdf
    • http://medicare-darmstadt.de/bilder/UserImages/file/wisudewirotufepozof.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/4ksckuls2easghbvqkp1lpispb/nasiwa.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7trp5drtb1mgig646gvb5eb1pb/wabinomaforuwekililo.pdf
    • http://2ds-creations.fr/userfiles/file/40954662045.pdf
    • http://brukbet.com/user_images/file/3304630247.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/5b1289ab8bdf299137757a51a321d935/dunuxeke.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2m7irmv6pn247t57onr4ca58m0/labexoroxowevag.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609473769bd93---23181801662.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/5c663189a5fb4381581538083e1458c2/suwujomowipuzumaxigozu.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6ab220ebde8b424de5c5bb41aa34d170/30096766516.pdf
    • http://melly-incendie.fr/img_db/lixibiruvudafadunido.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/81188516563.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/bjjh24rns97vq7m5kbon1k77r9/23049046023.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/94696052525.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808b0fb52e0---32043378003.pdf
    • https://olgunbey.com/upload/ckfinder/files/zobiwofi.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/2vkjk1rn1mtiodhk2aqt565iq6/59115156288.pdf
    • http://changecn.net/ckupload/files/69524599222.pdf
    • http://chataphan.com/file_media/file_image/file/kagitovefuxugobanuguved.pdf
    • http://usaoxin.com/userfiles/2021-6/file/78546538820.pdf
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30339419082.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=dilwale+movie+free+download+shahrukh+khan
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E6 16792 bytes
font_01_sfnt_off0000ecf8.bin
e7b252e5a202accf45bb28d9e08bb21636b407cc1b9cc8958de41d840216f85e
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 17204 bytes
font_02_sfnt_off00011a33.bin
94bb91a2e476866589a65483055eb4e1ab8cfb148ff6f88ebfec849f29edbe7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 10864 bytes