Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cc18007bfc7bc3…

MALICIOUS

PDF

69.0 KB Created: 2021-10-01 02:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa0254b8261fc527f3f89e67000693e5 SHA-1: dd1a3651958db035b0fa4fdcc5e1b162fd2d0e01 SHA-256: f0cc18007bfc7bc3cef1f830331893ea373d46908e650b68b9a6e503e8d8f9b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=singam+3+tamil+movie+full+movie PDF link annotation
    • http://rockhousemethod.com/ckfinder/userfiles/files/visosojutoko.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/xopiv.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/lerezipixow.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/nanoposobopodawimulu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/68945517897.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/32130665734.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5317021cc---lefosutawubo.pdfIn PDF document text
    • http://tayles.com/uploaded/wowejositowuxabugevis.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/nipixusivafexewufe.pdfIn PDF document text
    • https://mar3ol.com/Files/files/taxesigajizaj.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/kuvikijeropom.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/volevufuzipiwumubal.pdfIn PDF document text
    • http://badgerhillfarm.uk/19961888868.pdfIn PDF document text
    • http://anm-av.de/uploads/files/24031213733.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/nigisexijexinusul.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/patumutonimavokemuzo.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/55700553696.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/latenegamariregirulosalu.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/16431890559.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/zazoveguzepoj.pdfIn PDF document text
    • https://granitnet.hu/editor_up/zenezibexuji.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/xozufumekejovikibuk.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kdphqvss3apm18vfhp7a0eoo35/tubotujolaneropuzajaboju.pdfIn PDF document text
    • http://ranch.pl/files/file/68194114084.pdfIn PDF document text
    • http://aven.su/userfiles/file/lotutawenurelomiwolewov.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/17508249167.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_off0000b086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB086 14844 bytes
SHA-256: cec0259e69a34aefb78c26d8cd18408b9cf0e407a9823f1f47b6f3c630a57ca6
font_01_sfnt_off0000d5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC6 10704 bytes
SHA-256: 82e7cdc5b8296dcc3cd8e84671bd4556d29e98ddce564653f6563e5a30bae1cf