Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddd15a13eba7af4…

MALICIOUS

PDF

68.6 KB Created: 2021-09-13 15:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 17e7c5264ea7708a92cee3154d857c4a SHA-1: f2f4f3f9783e5a6028dd14e919a1fb74bd15e072 SHA-256: eddd15a13eba7af41ee8e90eed223a406a355cbc4fac2d6be40edf323459c24b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, including an image-only design and embedded JavaScript, likely intended to trick the user into interacting with malicious content. The presence of a callback lure heuristic and numerous embedded URLs suggests an attempt to direct the user to external resources for further exploitation or data harvesting. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.
  • 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://ylgems.com/file_media/file_image/file/tetubosotifiweluzixazi.pdf In PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/71078979874.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613637e198054---99598460779.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/95769174244.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/44557723882.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/75984650351.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/loxorekezoxeguvagiti.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14371427419.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/66701929089.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/tuwironibixinumiruxapu.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/69677808331.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/kiradazulan.pdfIn PDF document text
    • http://sakra.sk/storage/file/38994779232.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/zidadazaso.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/gariginovazume.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/bepoxirexugodusejedof.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/63429487204.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/94974304943.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/kikibesakomubaga.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1415341136133559a2853b.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210907091209255.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132dddb9b6ae---47695351120.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/23493849230.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/82794660197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=appcenter+sdk+androidPDF 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_off0000b0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EC 13944 bytes
SHA-256: 6a349a85196b17316210aaed1dfb3e51d1bb0741af6c07a2a19ed50b2ee9d6cc
font_01_sfnt_off0000d332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD332 10532 bytes
SHA-256: ee640c788670954d4b58aba6107c68f47fa4b99b559c2dc4bd8095d770cb292f
font_02_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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