Malicious PDF — malware analysis report

Static analysis result for SHA-256 479008e64f318bb5…

MALICIOUS

PDF

72.9 KB Created: 2021-09-05 18:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ea3e94d18852e6406a7d827ec63a0742 SHA-1: 0c2179e980a3701f28dd7748d3526a87e8c28ce1 SHA-256: 479008e64f318bb5ef3a93354f9be942c38c29e408f95790bee18fabaa0b8d51
212 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links to compromised websites, indicating an attempt to trick the user into downloading a malicious payload. The presence of a visual download button further supports this phishing lure. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a0ff9c0d6---jomikavepuler.pdf In PDF document text
    • http://minhledtran.com/luutru/files/27457174497.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/jimofizujutorasogotakejip.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/v7bd8294vr255jd2g20b3oaia7/56777661964.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cde13e9c---67865487204.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a280c78df6---fuwidesikizapupujunun.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/16637327435.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b90fa1705abfe95b10620cdc7c5ead2e/refuritove.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/87389307968.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/55256911158.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a79107197a9---14177013930.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///xezepovokaxesojatoguw.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/wireposakejogukeli.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/lakowoxamu.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/xumevinakadikabinotojifot.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/cd1c4f5c26d887839a4a7a0d141aa16a/96139344793.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098361e37aef---zozezurivezomid.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/5gmd6mjjkomq37i45gln97lkh1/64100466267.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5mu4oba8gu1vn2us6c6t5r6kqt/35484249632.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/ravixavezodurewiwogexate.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/nezawekenaxeta.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/tavozador.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/bamawafavupixomowukunun.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/16849748005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=market+leader+intermediate+free+download+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

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_off0000bb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB78 10660 bytes
SHA-256: dbef8f5b61f80ad91373812e7853a46fd360be43a7ec06fcd1ea8197379048c0
font_01_sfnt_off0000d3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 16344 bytes
SHA-256: 1eceaba2c15cc0215aa86c5f078ede8b1ad79d0997d5721205ed0509e1bf8bef

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