Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb3d6470f17de3e…

MALICIOUS

PDF

77.4 KB Created: 2021-09-18 19:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 81e3efe36b311cd651b4243a945ebd36 SHA-1: 2926c1c0b8e2abc17f050b98c3cce153f99a0d58 SHA-256: beb3d6470f17de3e70773a8a6016e5b265339710c2ebe304ade26fc9fa603699
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of a 'link farm' heuristic and external URI firings confirms the primary attack vector is directing users to external resources.

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
  • 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://allytemp.ru/uplcv?utm_term=pubg+mobile+update+1.4+apk+download PDF link annotation
    • http://lammermoor.net/imagenes/file/bepawesimuzuvazavimot.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/31753236689.pdfIn PDF document text
    • http://zenkatsu.dk/files/wugavokevobebizovo.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/96188271330.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/4430805125.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/87604961913.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/25062418951.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/lafavoxoduvemejugowamezux.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/bukanevejuli.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f27f45a1fb---29867930839.pdfIn PDF document text
    • https://equinox-e.com/upload/files/30040639766.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/92132705132.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140bec5bb121---91544010549.pdfIn PDF document text
    • https://citrasas.com/userfiles/file/mugusow.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/64869345183.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/5625378027.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/vofepimem.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210907_105233.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/kikisoju.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1631256327.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/54250935792.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/25583637447.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddefd42df9---33362762332.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/gipunozalir.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_off0000c7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CE 11080 bytes
SHA-256: 179d317ca0d0022579e0ec0b277becbfb47b1cb7bfea762fbbb04ba5d5ba2886
font_01_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 17820 bytes
SHA-256: ff6078bdcf7442cae5c2673c9c2a677bc33c66401548e11eb3a0e3e05803f61b