Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdab1889ac18c871…

MALICIOUS

PDF

91.1 KB Created: 2021-07-05 14:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 05affeb4b7744eca7194ad1df922d5f8 SHA-1: aaf75e35cfcfe72b870ac9677755e5569036fbee SHA-256: bdab1889ac18c87170711bbbf14ef547447424769de38211954cdfde8d546d68
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6697b06ee1---56793345156.pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6697b06ee1---56793345156.pdf In PDF document text
    • http://alltechsro.cz/files/26512665923.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/rguqa04p1p9t723qeo96f3jgbu/boguja.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/16fae073fed9f922fcb8e76f090eaa34/lususivapixefidivenigax.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/27746334684.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a72b44fd05---23644870314.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/nomefa.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/vumagekozogusanobamibires.pdfIn PDF document text
    • https://btegypt.com/file/zodokaninoxoposu.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/vuxufonapadonalevesolaro.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdacd54d52---78879523846.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/87992051311.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///kesivowofepovaj.pdfIn PDF document text
    • http://mariangelesorrico.com/galeria/files/91890223587.pdfIn PDF document text
    • http://smeclassof1987reunion.com/clients/37165/File/93335315441.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cb2f238927ff89a6f030c734166a3305/teneni.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160acb93a55df5---22703089517.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/kipifo.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/5b077db95c38aeb283d0dac2128d24ed/33743163197.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/sowogefema.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/11010137817.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/lisokududas.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/gti7s8e99nmta27099pcor1uo1/16513186134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pining+for+the+pastPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11863 10592 bytes
SHA-256: e29d54fe03792f81477368f95b30adcffd75d417a352feb7125c7741f916032c
font_02_sfnt_off00013087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13087 17212 bytes
SHA-256: 99da515e177b6e61767197f974d5fe84cdc755726be73077d001eafe6b489cd6

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