Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4db09f6ab3e626…

MALICIOUS

PDF

81.2 KB Created: 2021-09-09 01:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 075b10ebb8fd62a22de1ba8246615b60 SHA-1: e06fabc62535003ed3b1a6e4f06fe192941c15c2 SHA-256: 2e4db09f6ab3e626f08d385196af690aec2aab08f88d32142bd76957040a685c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of link farms and compromised CMS uploads points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://topup-fight.com/ckfinder/userfiles/files/fesiruso.pdf In PDF document text
    • http://atya.eu/files/file/41822328594.pdfIn PDF document text
    • https://vendax.ro/files/file/98248395841.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/vewidepefifekobiwupaborom.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/84160205310.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/060ade1780fcfa4efc7c972cda43a2c2/39079648196.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/reladosiposupilo.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/tofezenoxigisoro.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/94172913122.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/94469435286.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/mefomakinag.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/65707982235.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210903015343.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/55924089569.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/gifalodumural.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161392998e4f8b---towulifukatijowivige.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/sotese.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/dedf6c2970b23f68301f349df333cdbf/70343954688.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/95039539615.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613673fc469d9---34524367202.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/ebd1821d07a5daae4c382e73ed94d30d/36431196206.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/81560650799.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/torawuxobamazekale.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/figejexazaxamaxoma.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/49029595763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=play+android+apps+on+ipadPDF 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_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 17348 bytes
SHA-256: 100a57c33a7d120e574a16419813fb1c99ef7a197e35c465757cd0b926a37651
font_01_sfnt_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 10268 bytes
SHA-256: 9d5bc032fbbabf6d262091c3c3af634d04e40036270dce9d263cf8641b6c0522
font_02_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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