Malicious PDF — malware analysis report

Static analysis result for SHA-256 94488799ac9daba8…

MALICIOUS

PDF

96.1 KB Created: 2021-07-16 00:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a298c03fde72f51fac75e19188d22000 SHA-1: 14d65716dc11dd8a9d38e9735da547aa26d21582 SHA-256: 94488799ac9daba86dd0f072b5350903980e19a0b0f545151253acb3c7278edf
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, including one hosted on a raw IP address. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://diysmart.net/userfiles/file/46226236063.pdf In PDF document text
    • http://textingrights.com/userfiles/files/zeforoziperumipasogexela.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a2da5f8e2---37354851432.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e997ebc2a6---fireloxasowojovafapowuz.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/21ee8be0ef8ceba6e72c8aad849ecc03/29028700392.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/tuxemolalisaborarag.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210619122704_1573784119.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/95109627692.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d50848e1283---56905072116.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc15576cff---22865718596.pdfPDF link annotation
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e90e3b549526c2890944ab254c143d23/ruwemo.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pulopidizonuxef.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/b6e768d646cd742577247c929c8f59af/gekivepeko.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/wuxojizolowos.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/77362750197.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/87014017444.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608aad9eab1ce---tedawov.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/aa8883cee290fef51c2beeedb1fffdd9/puvaganireloxufomab.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b666ca605f7---seragufavolexomuxir.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/33984973713.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/67925709205.pdfIn PDF document text
    • http://muslimofwestbengal.com/mwb/editor_upload/files/2354266564.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/zuguruloti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=positive+connotation+for+overprotectivePDF 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_off0001176b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7D 16852 bytes
SHA-256: 777022636ea85aee7a281952835d458ddba3791441908fd861edde6decbcbe2c
font_02_sfnt_off00015b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B00 10492 bytes
SHA-256: b5f370434afedd3b3b943b81e8d305a004563b8dda2a230e2ef39ced520e4955