Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d067031fdd81b1e…

MALICIOUS

PDF

86.2 KB Created: 2021-09-02 04:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dd3571ce0c9d570ec4beee2f411d85a0 SHA-1: ddda4949e6965cdd2509a2188b8a2804f052e95a SHA-256: 0d067031fdd81b1ee4f57a6eaf7ae2d9bc9e773a530c26334a920cf5dee12560
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicate a link farm designed to redirect users to potentially harmful content. The primary attack pattern involves luring users to these external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://kotolantopeni.cz/file/nosavediverakefuwuwi.pdf In PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/xifazeloguzuwumarupitak.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/58491897899.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/gipekobezavefejelabuke.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/35269490867.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/hq4lu5hi5hak24r43laf1vsmd4/90785086467.pdfIn PDF document text
    • http://sakem.org/userfiles/files/fakome.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/ec455d2c81cfcddcef4e258d7bb8abe6/24905506698.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d21dec890---xotesikuseralota.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/26952976355.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/megitukufibifiwamis.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/30624741964.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7ut3h3hfeh8chflqpm03t7ns13/bedafudakamukejepud.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078aded54755---59112597375.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f8f05a871---tafofet.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/tudar.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f86acc51cc4---39689763827.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a6258a6cdce66724ffffedd195ca3123/nusos.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/bejopomeginanoxeb.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/kopeladut.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/91651011039.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f2683a263---leler.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/wopejakufofamawadepobavu.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/61605900291.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/53410355143.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/46207977176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=designate+for+assignment+meaningPDF 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_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 17860 bytes
SHA-256: c63c152e92e4e6eabd7b2a080d26cb489a4b767321dc4b24cca37c7ba946c515
font_01_sfnt_off00011af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF0 10512 bytes
SHA-256: 3603595308381747cc5d5a4cdeed0be0c43bd3349f58c2968a1040462af8cc22
font_02_sfnt_off000132e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1