Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa9d1f4650c3d29…

MALICIOUS

PDF

137.2 KB Created: 2021-07-02 15:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cada5fd38b8953f1a5f602fadb21e905 SHA-1: db5f1f0db82bc4d2fecaa6dc31e2bcca7d435b59 SHA-256: afa9d1f4650c3d298e5667452e995a219bd11bf10aa633d7bade2b7663834dc2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of multiple distinct hosts and the use of UTM parameters indicate an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 https://catamma.ru/uplcv?utm_term=barry+goldwater+campaign PDF link annotation
    • https://dineflon.com//files/dikop.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071842ee7a25---82951829185.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/18a653c35914d7ce8fd1a8e0e409235f/nozobukozovegejaxilipuze.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210610_4D966494DF359195.pdfIn PDF document text
    • https://panama4d.com/contents//files/xabofakut.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097ba1782aa2---xamad.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db6b07b1c6---nurawogebilan.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/bexarisoze.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607959a2878ff---89399119752.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb2f0b37f---ponarolopunexolomoro.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0f561ad78---lumabopomo.pdfIn PDF document text
    • http://safarang.com/basefile/files/56955900172.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084adcd47fae---50399134417.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/javodemobew.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/logumetekobogegusa.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/69311526645.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cfb995ff0---panapa.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/wekejidokinofalenudiriku.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/vanoneduribebilakolinu.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/74340174026.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/db9455e6b52e14112785efff5843a328/rijisafugujimodosefine.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/xudibudilezigo.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/otk1k6p1o352t1ut8thmgtartj/zunuxelukexomase.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/78e384b77ef61daeb1649758beb78b24/gefopegigalunexiritu.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_off0001b5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5FC 17664 bytes
SHA-256: 3311aa7382be023c34450d5fa7c0524e8a323ad65c0bb17750c80a52dbadcef9
font_01_sfnt_off0001e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E43E 10944 bytes
SHA-256: 8ef8316ba75382ee20321a9ec44ec45cdecae0453f252b4967992bf7ecc77de1
font_02_sfnt_off0001fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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