Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d801be238608a0…

MALICIOUS

PDF

80.3 KB Created: 2021-09-04 01:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bd05e2c4e52191bb9e84e3adb78ea541 SHA-1: 53da7298f74d98637ab77fe1280946c0699fc1c8 SHA-256: f2d801be238608a0d7605494c04ed1ec134c13dc5cff07cff6d3f0654c480f39
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, with several linking directly to PDF files hosted on these sites. The ClamAV detection and ML classifier strongly indicate malicious content. The presence of embedded URLs and the structure of the document suggest it is designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd5fc92298---matifajifik.pdf PDF link annotation
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ngpftr89niri2ocaa30ccdssm5/85972991320.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/78544846126.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d081e51de32---39840894966.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3e16698ef84153875dfbfa6b986cd836/63985477926.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/77430504835.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/39819132581.pdfIn PDF document text
    • http://mutitar.com/user_img/files/javagoladulodab.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/37b7be1039848feecf02ddc35c9dcce6/89741891455.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/98273614739.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/92459785784.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/0noh926bn79c5i0v22pmjm88ph/vituperuxulagevev.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/1qff1qm6m0v71gfr72lbuqug2r/76518563012.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/c3a064d74b4387a677967877477ef5db/19816903483.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/gebeduledolemove.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4mgo154amtekk2crvsno2arbl2/20949271884.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608adcb73b382---gedimo.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160791cff2f603---55724483723.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/vq2f1gbv7pl39ijn8ggtt3c0m2/bokile.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/nabavanuzufukadeza.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/13285608074.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/75291669149.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/66de62b332e54a261126bc808347c995/giwidi.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/zogodagovuzafabawonutuwi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16113ae10d8c9b---12129033570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=interpersonal+communication+competence+scale+pdfPDF 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_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 17532 bytes
SHA-256: cebcc641f49268eeaf2de9b862de7aec5b3761079c45c42a1ffe39bbb0506f12
font_02_sfnt_off000119e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E9 10832 bytes
SHA-256: 40a90363507e066ad26e79e5ad992b98c8abc9977f31a3434cc237ab8a1f3606