Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec4af80002f0ffb…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 03:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 495ddd26bf9cdee433dd3dcc344f93e9 SHA-1: 824ddb55efb28e93892c59d27ee1be0f98396aa2 SHA-256: dec4af80002f0ffbdf9f0b3d75121663e1a09e7c6ff47af9969349e5d92a1bb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs that form a link farm, with several pointing to compromised CMS upload directories, suggesting a distribution or phishing lure. No scripts were extracted, but the presence of external links and the overall structure points towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16149fb636e491---rizitidoxusamuton.pdf In PDF document text
    • https://thepainter.asia/upload/files/41557233140.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/80394421565.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141824b5efe3---36667179916.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/37919380467.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/gevokupiwisizoberetu.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/e935e0737f8515496fa30f3274494da3/56519266588.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/s5vf3vrkok0v81h7svi48mdq4c/xomunew.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/67103538703.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6ac4c77b5---kelibizuno.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/98148282368.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/kazalixuxozinurozisivefut.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/47077794019.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/wemapitinivozakegok.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/10230207388.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/sugosirozasune.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/15121867580.pdfIn PDF document text
    • https://hssanesteban.cl/files/damomipuraloxaluxomusa.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/detabali.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/fupigimuwenidanuwadem.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/20310360723.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/40758842696.pdfIn PDF document text
    • https://partetesal.ir/data/file/wevikowigununifidi.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/85091483090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ullu+app+web+series+free+watch+onlinePDF 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_off0000afd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E9 14692 bytes
SHA-256: bb778a86305de71deecedcfdcdb4ccf8f4222cb1218a3f9fafe791ebc5dd05f2
font_02_sfnt_off0000eccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 10908 bytes
SHA-256: 4d39dfd08008bd0b18e3996b08a63baf014b1d67d94d58fdddb8a164d07b64d6

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