Malicious PDF — malware analysis report

Static analysis result for SHA-256 da60730a12bf2d7d…

MALICIOUS

PDF

81.1 KB Created: 2021-09-09 22:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 67c1da34e4ff2ae3426a31ea1475ffc7 SHA-1: 5b196aa93cb898f1c02d447ad9ac18a6bea21b4b SHA-256: da60730a12bf2d7debe66878b961598e1d819f08ce3c32b1e7b6d2122d853c78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised websites and disposable hosting, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure, but the heuristic findings confirm the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://alnahamgroup.com/userfiles/file/24133782347.pdf In PDF document text
    • https://tatvan.in/userfiles/file/sululopuvabuwen.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/122577408.pdfIn PDF document text
    • https://tl-systems.hu/files/files/32591983962.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/mozebawabupodo.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/40534727911.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/powuvaburaluruzuwane.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ve7g5qe002k1jb8ga9utlnbk4s/32835783535.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/96287545598.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/40831959148.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a528506601---28889479920.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/lelajugonafugemebomado.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/94146491168.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/golonoken.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/gizonipedoki.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/75202021074.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/55669889043.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/15h22ejtsep9c8eupn568sqjma/74116524682.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/pisatev.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bbbe17b3---xitimadagira.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/mizuriradesevezamu.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-5/20210905023338230808.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323af33416f---feponetoxetewisopuwebap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=watch+series+tvPDF 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_off0000dc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 17024 bytes
SHA-256: dbb51c3012a6f062b56769d38de13e4541619590bd8693475e6ff529d99757da
font_01_sfnt_off00010851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10851 10116 bytes
SHA-256: 76ae32f2b6048ad62094f76bc2c4ead111f0df17d5789c69b7ce3815ed890a63
font_02_sfnt_off00011f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.