Malicious PDF — malware analysis report

Static analysis result for SHA-256 1217af58a066a91c…

MALICIOUS

PDF

73.8 KB Created: 2021-09-06 09:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7cac2367e462d6f84115266d52659312 SHA-1: f615bb4198c8d4674cc208ec2e4f30ddf0d4a7f2 SHA-256: 1217af58a066a91c5a411bdf3a350fdfd7eb7e8acde05b1a9784ddf52b810a75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host and distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20bf2ebc83---nejeruwapidod.pdf In PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c597d50b537---zudamax.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210508/file/88452060934.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607160eed0429---pakegikazi.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/sazemutikejusiramop.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/88955275784.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/deronijuzemewugupo.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/57662824528.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1681425ec---9002397997.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f16c74b5927---67611774445.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5d8445e950c869461e6ca1fe0df664d2/famir.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/dfe31a2adad137e1d4b0011fde86c1cb/10391528049.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608816ea4502c---posevopuvonovekudebiz.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/q2dcj8gc8ilo4h9kvk9bjqmh9a/69028510484.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/wuxoxawodotix.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///jexaxififerakoba.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/wugepozapenegoleximovasep.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/kopisawemeninibefujodivar.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/poxevafa.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/tologozife.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///23022170577.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/6954603330.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20217292356259357.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/rexepex.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe2b0a7b8c---82063693544.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/59067820849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=principles+of+american+democracy+pdfPDF 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_off0000bfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 16056 bytes
SHA-256: 738f7b295754f2929ea27d9ec894ea94a5b47f0b2580cb7752b1ca738ea44e86
font_02_sfnt_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 10796 bytes
SHA-256: 78cc151e7e5d0e7ec62b327e3e1a70b2345a232653db9406c2d1c30c23debdee

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