Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0dfeee36389753…

MALICIOUS

PDF

68.9 KB Created: 2021-09-26 22:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79658aa8755c40440320485cb0c1c316 SHA-1: dfe7fcf0520a484df1e856cf3ad70a7b2f40f7e4 SHA-256: aa0dfeee36389753b53a104ee15d9d716b9470dae86283bf5d1f03264b17a092
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URLs, strongly indicating malicious intent. The ML classifier and ClamAV detection confirm this, flagging it as a phishing or trojan. The embedded JavaScript likely attempts to exploit vulnerabilities or download further malicious content, while the numerous URLs suggest a link farm or phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=driver+ball+position+too+far+forward PDF link annotation
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2d5434087---67803361788.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/muvipoxedumemaviveleba.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/jifubufetupasuvevonu.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/zoxipezarufuk.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/41793420929.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/jelix.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/23736623665.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/73916461338.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/43077082410.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/telorupirurukiveno.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/42071048696.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090321512133.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/reruzawilefawozimopulo.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/49659315779.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/85523987931.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/48160975323.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfe64f2abd---68154181365.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/22563141484.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/mogikikig.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/femosemisifekewo.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/7927364060.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/visuvowupeku.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210905114329.pdfIn PDF document text
    • 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_off0000ae9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 15144 bytes
SHA-256: 27595b012390786683a29bb60d9683855098fc9b2eb9f5f881f93a0b51b0de01
font_02_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 10784 bytes
SHA-256: ecbbfc7eb3a1557275936cdf70753452095bb23927f58e86492c8d04b88e9734

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