Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ecc9aa897fe9c2…

MALICIOUS

PDF

105.4 KB Created: 2021-06-29 23:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1fb6cd2e638f982b465ad3902965f22 SHA-1: bee2551fae8ca9b1dcb75329eff46e6ffb0a4774 SHA-256: a0ecc9aa897fe9c2e454a4637a1a4a23aef2c84d3864d5054558ffa27fa56471
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • 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 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://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/84389599959.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e16a46f63968de3c7262ef56863a263e/59899111190.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef73d09b74---98932666503.pdf
    • http://wannawwannie.pl/userfiles/file/30379685447.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d96a10e1706---88034954266.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcafde4811---94722475518.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/3f1b299558d7af1a52e7edcddd7cf8be/fujuvuxuwefozilelolujun.pdf
    • https://biovuspharma.net/userfiles/files/powemexoruvepezasegamas.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f73524e49---pibifexodujepukol.pdf
    • http://hilimall.ae/uploads/files/72416876418.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/4d260c2cc3a08db36210b6189d87dab0/tonowawejopadi.pdf
    • http://ibshop.gr/uploads/_uploads/files/purasa.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2cc7993e6---bemufekemimajosugojele.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/jhccpvero8evln72t2950p85gm/zabilelilune.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8aa10fd91---kuvusejimipotote.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c65b9ab3798188a87f7a4f654dac4f02/94870875281.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160783b7791a3a---13733974186.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a738df5e156---22978239717.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/ranl6k05pn1uqufecp7rcklnst/85129879730.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/gotakafok.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4f8ac89b3423155cc387469e80fcda6a/xawupinowowumepe.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2a11038b82217b9322c077f1582bf3a8/simipimiberi.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/eb7cf2585c9a1bda42eeba51edfdb716/tukusozatibu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pulmonary+endarterectomy+with+embolectomy+requiring+cardiopulmonary+bypass
    • 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_off000136cb.bin
987a72dc5c51269ffd5aa5dd48a9e8fc1b85f9a75545ca5872c48ee5fb0d39b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136CB 11548 bytes
font_01_sfnt_off0001514a.bin
e17e4da0e2e74d6cd3106e3b038c27e8a858dd6d840e467d623e605b781bc68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1514A 17844 bytes
font_02_sfnt_off00017f56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F56 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.