Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed19e53274e5907…

MALICIOUS

PDF

78.7 KB Created: 2021-09-08 16:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 73dd9c69d698bba94bcf8603d05375eb SHA-1: c2305a3a50b7beb94aabfd5e10127a3ac78c71e7 SHA-256: 5ed19e53274e5907e13ac39d525818afe594419dd00557e01a79a63b47924cac
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which lead to disposable hosting domains, indicating a phishing or link-farming scheme. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=zinc+plating+process+pdf PDF link annotation
    • http://jafra-com.at/userfiles/file/55414849493.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/97082198578.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/lesusiginasanetowatoruv.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/nawokigajopiwopuk.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/fesikuva.pdfIn PDF document text
    • http://deforma.it/userfiles/files/lulobajitozegigi.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/fudidezodum.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/dabifelu.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/weseridipuxejefesavax.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/60419247740.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/58157836404.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/42674048906.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375c546ab9d---wozapikasimuvajifed.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/91764501380.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/gukenupufiraganofixewil.pdfIn PDF document text
    • http://metabolit.ru/files/file/gofinipol.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/febumezadaxotex.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/bogukepumojekukafe.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109011953597517.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/lejomosuzojunil.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/tawekunadofepapegudi.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202109011007189223.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/pabenuguzedovaruji.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/libovaboveki.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_off0000d15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15E 10756 bytes
SHA-256: 1753523facf5794b4a2bf1b4be6a1b30e33759a8cc20d6d5a982536141333d05
font_01_sfnt_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 16872 bytes
SHA-256: ceed1a350488275435fda4d1df47fda003219f156317a79ce33e2307ac82eef6
font_02_sfnt_off000115a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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