Malicious PDF — malware analysis report

Static analysis result for SHA-256 780aab36c8b42703…

MALICIOUS

PDF

85.4 KB Created: 2021-07-04 07:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e84c54c1d808c18f28f949d83e99e65 SHA-1: fc3a402964d3aecec88633acf5c3074731715ac3 SHA-256: 780aab36c8b427031d951b49e2cedba3c5f214f0cf5adbe257af407ae0a666b0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/rozetojiverofisutopis.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9c4d3b7a1914f6ba7992f4631489d406/gobirukuraduputiwu.pdf
    • https://prtl.pl/userfiles/file/93548116077.pdf
    • http://dichvutheapec.com/upload/FCK/file/fokizilekadirogaro.pdf
    • http://granitemountainranch.net/userimages/31256349028.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c212d6d574a---moguxuloxo.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/cf24c4976a7a6cf645b16a7218186336/52079602615.pdf
    • https://dijitalsanat.link/upload/files/suwuwagotefovax.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/608d2c97412176e858c99d73ce434a1f/wowunetedod.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/l8hckia7o8j0gi04get9edbugq/95647816848.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/oaor62a9hm76j7bouogrsn4404/mozira.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/67996140546.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d69a97a495f---zevuxedeliketofor.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7f6713178---pogumijunijejonobanam.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607211acd3865---mijobulexebed.pdf
    • https://louvre.lv/res/wysiwyg/file/vawidirekipalafopisakenu.pdf
    • http://127.0.0.1/kardelenemlak/upload/files/59996087646.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784c894e6e9---duvosasewazosof.pdf
    • https://ludifrance.fr/userfiles/file/xibekej.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082909c221ab---77336585507.pdf
    • https://avistravel.ro/userfiles/file/24375873025.pdf
    • https://myphi.biz/nbloom/fckuploads/file/26056192825.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7c4e73fe11a3ea640e6f14beba057437/panuwidevezusisoxija.pdf
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/85200629024.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=swelling+upper+thigh+groin+area
    • 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_off0000ec65.bin
5b70e60ed8f5307514cf3784c0135fe75a66f6e5f56489322819eac63c1eec05
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC65 16760 bytes
font_01_sfnt_off00011812.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11812 16792 bytes
font_02_sfnt_off00013029.bin
b5fd3e69fdcc7dbb4e257595c02529c2fa7f0d89bebe1a5ebde422a1cf685913
pdf-font-stream PDF embedded font (sfnt) at offset 0x13029 10624 bytes