Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32eda6356021e34…

MALICIOUS

PDF

98.8 KB Created: 2021-08-09 00:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 188b212db6a34ccc82eb3f18cf581499 SHA-1: af3fe74d57e7cd57c15d375575c8b9d729ba7485 SHA-256: e32eda6356021e34a3eda7f3f81e3328acb96232f0c88c21bc1dcf676f01a914
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary function appears to be redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://eyetracking.pl/userfiles/file/52295316755.pdf
    • https://eletvital.hu/uploads/files/xiwimitobifes.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea288619fc---zinavonobupegufanareko.pdf
    • https://heatingboiler.ca/fck_upload/file/dozuredukogoxorugaxabi.pdf
    • https://bodymart.in/ckfinder/userfiles/files/taromizatewar.pdf
    • http://dulichtantai.com/files/uploaded/files/63706375274.pdf
    • https://amrapalispot.com/userfiles/file/tutuzalapixagiguritomudal.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608095d2a6e3b---83567503656.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bf8ae1c6d75f8259a3c5edff2b64c222/30089196149.pdf
    • http://otczenacts.com/media/files/bovizoxonoxalapukagitod.pdf
    • https://samarpanbharat.org/trila/userfiles/file/2526347677.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/nuzepaga.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ca7e0dade---wesetenezixunu.pdf
    • https://btegypt.com/file/40148656934.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/db947bf5a0c373fb81664565b0292428/25249538094.pdf
    • https://stmarys-perthamboy.com/upload/File/92323819310.pdf
    • http://luatsugiadinhviet.com/upload/ck/files/32981948661.pdf
    • https://stallion-international.com/userfiles/file/gomovasusiselajanijetam.pdf
    • https://ipic.vn/userfiles/file/19916505177.pdf
    • http://hasyo.net/files/file/90128671155.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ns9lk6j1ataen90krkt9jmk675/59279400351.pdf
    • http://andrelandberg.com/userfiles/file/66820732464.pdf
    • https://houstoncoinshow.org/FCKeditor/file/73107729753.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/f8c5roo5113ua3lqprl3ai44e5/85272846006.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fbd8adf63---67962538363.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=anatom%C3%ADa+de+los+animales+dom%C3%A9sticos+robert+getty+tomo+1+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011737.bin
d3d2bcca3137298d3a3a019c473a92ed2bf1599101dbf33f4a470f83764e2066
pdf-font-stream PDF embedded font (sfnt) at offset 0x11737 11464 bytes
font_01_sfnt_off00013197.bin
5769af62d1ad9bd805b3d0910f49d06faa17304d96c4b315feb2c1be64b9d95d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13197 19032 bytes
font_02_sfnt_off0001623b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1623B 16792 bytes