Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae0228897b024e0…

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 14:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef82f6cce440d41397c585238f9eb529 SHA-1: af82c75050df7c9ad70dea8f24b50672242e3548 SHA-256: aae0228897b024e0478837af5fa4afeef64dc8afa2809fe7fd96d5d368db0ca4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to distinct, potentially disposable hosts, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/73857443108.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161415d952fca6---98690104348.pdf
    • http://www.cda.org.hk/ckfinder/userfiles/files/lowupezuvile.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbe487b779---98972446374.pdf
    • https://rajakeempat.com/contents/files/linetipim.pdf
    • http://hoanggiaphatstone.com/upload/files/84346886883.pdf
    • http://frezerovka.by/images/fxeditor/file/mebigurinatu.pdf
    • http://zehanbiopharma.com/upload/files/fuvomagaxivawofubajina.pdf
    • http://farmaciafoglia.eu/userfiles/files/55579354998.pdf
    • http://ticketsperiodico.com/galeria/files/jijitupepaxotizimi.pdf
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/wavowojefogujiwagit.pdf
    • http://www.bash.cl/media/file/lenexotazujosinam.pdf
    • https://preciseenergygroup.com/media/94520669161.pdf
    • https://etevent.itweald.com/uploads/files/6131acd9c3c19.pdf
    • http://connect-event.fr/ckfinder/userfiles/files/fetetin.pdf
    • https://wmu24.ru/media/file/77641095982.pdf
    • http://officinedesign.it/userfiles/files/waromufijugetarug.pdf
    • http://www.pattyn360.com/upload/forum/files/77679178917.pdf
    • http://chiron-ventures.com/chiron/home/img/upload/files/210910065515545152mblso.pdf
    • http://metalzilembo.it/userfiles/files/gikuxomemoxoto.pdf
    • https://108pizza.pl/uploads/userfiles/files/tinezumifot.pdf
    • http://ore-processing.ru/d/files/23871206910.pdf
    • https://dolaodong.baohohoanglong.com/userfiles/file/7706536115.pdf
    • http://cu-mbc.com/ckfinder/userfiles/files/51259634774.pdf
    • https://zaindu.drogomedia.com/files/galeria/files/27366173221.pdf
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/5912317339.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=download+the+sun+origin
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b131.bin
218fdb1f7a3655cfe9d90f1d216b1e21db9099eab3774e763d53b8b677146eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB131 14552 bytes
font_01_sfnt_off0000d59d.bin
3e185689c7f65248ba67791b147485a3bb2511b49c2771ed8d9f2fe037458544		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD59D 10712 bytes
font_02_sfnt_off0000edfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 16792 bytes

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