Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4c2a551f164857…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 22:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e1e2089d57f187294a5061bb6543aa86 SHA-1: 727bf2a07fa117be3573bfa54c1ee7cfc9e0c854 SHA-256: 9e4c2a551f164857e07d9037e99faf11c91817652456194700c0390b46b325aa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://xn--e42bt3l.net/upfile/files/puburumone.pdf In PDF document text
    • http://sakem.org/userfiles/files/5637872590.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/zetorovubuzadug.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/saxaliwobeboxejuximu.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/bakumowosekezebidijer.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/rovamafojituvorojepagema.pdfIn PDF document text
    • https://chptravel.ir/data/file/90331393858.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/sukowebelotu.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/11mfglpho91detp1b08dh05ui5/99811852177.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/36617352641.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a872eaa7c5---xobakaxa.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b49e9c000---tojezulawaluzir.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a23c2167---rafomadifapufodedukowufo.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/vumaripedetomoxomin.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160755cfd2edc0---rukojuseginujaf.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/92485435642.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/muzixidimeromegagumase.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dhrngkvfbg1cjmvb5d5o8u3jpi/mosor.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/tatufudapojuseboxav.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160abef1f6f7bf---taliwadulomozogijizi.pdfIn PDF document text
    • http://labotinnghia.com/img/files/suvuwirulirifux.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/11cefc83e2cc3adbf7c534f04abc1860/65697586111.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/64906994353.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/r6rncmpkdfmmnnqcmd2lap2eol/68191985686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=understanding+design+thinking+lean+and+agile+pdfPDF 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_off0000d919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD919 16880 bytes
SHA-256: a85483e596b2d9eb610f9d1606d1c49f2d7bdeb18d19fa8f06807cad449779d8
font_01_sfnt_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8F 10756 bytes
SHA-256: 328fb24701b64ff5473db137a640468352713e9216e3d7399619b9c883f0831d

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