Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2c2fe294e8c4b7…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 22:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5f39d2a3fcd9bc90aa1d85be28ac4b77 SHA-1: c9f85bbc5cbe90e25285bb5661135c4fcb9b3870 SHA-256: ba2c2fe294e8c4b7523eecf5ac574632e6554f28a42c9b887dd0e09ccb5ffa84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it may leverage embedded JavaScript for redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://oniceh.ru/uplcv?utm_term=real+happiness+the+power+of+meditation+pdf PDF link annotation
    • https://groupekheidri.com/ckfinder/userfiles/files/45222038343.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140942515690---davevafarudogowan.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/38346295951.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/66891284518.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/xanegefete.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/91a8af70966691ee49151e12655a98a1/mogapagamawupuvegimo.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/82316303321.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/65027534121.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/88ce804ab2ebb595bf0c05b2b8a075cb/47108410037.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/78503397713.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/10578111334.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/begemus.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/sisuwuzukuba.pdfIn PDF document text
    • http://fittbikese.hu/files/file/pogofifivezudulawevanubo.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/jisijakozosamujife.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/fofirutawezijow.pdfIn PDF document text
    • https://alutat.com/data/file/bijuzapak.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/doposiwum.pdfIn PDF document text
    • https://angkagenap.com/contents/files/wafowap.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/53680479917.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/39103271379.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/mubikubakonoritez.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_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 18756 bytes
SHA-256: a6d6c2f3922f1da9ba4b46f8477f63225ccb2098f7f4edd6894e3214a27ed638
font_01_sfnt_off0001131d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131D 10896 bytes
SHA-256: c80cf684ccb34fa5be8515879da02e5c798c84c24804e440ed0c4994c03f3a79
font_02_sfnt_off00012c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1