Malicious PDF — malware analysis report

Static analysis result for SHA-256 62feaa9d153e04b4…

MALICIOUS

PDF

76.8 KB Created: 2021-09-08 23:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f927d2f587c6bfcdb58eebf47f6a1948 SHA-1: 0bb770f9fc456e0528d463e44b77a8410ecd8c94 SHA-256: 62feaa9d153e04b4d0f3ce9cd721a46ac026fe50425e36b5687f8674695b902a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external URIs and a URI pointing to a raw IP address, indicating an attempt to redirect the user to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests that the document is part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=annotations+are+not+allowed+here+android+studio PDF link annotation
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/68979417053.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/77854265633.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/6458755082.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/47404510973.pdfIn PDF document text
    • https://penzion-palice.cz/content/59021299404.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/30600808636.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210904202305.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/gudupiduwowuno.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/befaxuxosotovanutonel.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f101f1f00e---fodotaxujimapesedat.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/32837140283.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/vusefim.pdfIn PDF document text
    • https://tipresentoio.it/images/file/13820758532.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/10096403706.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/resijogagejelefuv.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/sariveme.pdfIn PDF document text
    • http://anm-av.de/uploads/files/sekarasonesikifuja.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/24844999777.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/nituvowat.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/27543935017.pdfIn PDF document text
    • https://schmitz.cz/res/file/78755749990.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/76792250102.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/67409788562.pdfPDF link annotation
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/48052826770.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_off0000bca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B8 21916 bytes
SHA-256: e1a78f8a73eecc4dd754b9d6095f913ca929a7f545674ce7f58720eeb0644d8b
font_02_sfnt_off00010d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D01 10512 bytes
SHA-256: 1142397cf865ab2a6777db03427d16800fb5bd7e7f0d4f86ded66778f446f419