Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49ed773a8dc60ed…

MALICIOUS

PDF

84.1 KB Created: 2021-06-27 05:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64fcd992caa7ae3db79c37b55daa9949 SHA-1: c2e18db5dea1ee3d5346bc46a1434f60dcfbcc02 SHA-256: e49ed773a8dc60edd64fcf635cac1f51364946c1e53e12a122c7e9236ab5b2b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS uploads. The presence of numerous links and the use of disposable hosting suggest an attempt to distribute malicious content or engage in phishing. No scripts were extracted from this sample, but the overall structure points to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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 https://balajitutorial.com/admin/userfiles/file/pevezamonasopoxu.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73142d381e---vivusapitabudixakodok.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c66b436bd1f0b1be4076283311c33f17/82455574328.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a404c777a54---fararigubazifupodas.pdf
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/38534674872.pdf
    • http://internationalnetworksolutions.net/files/kesudutigarabobabotetar.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be7c0c7f313---fejiperi.pdf
    • http://wami.cc/data/files/57077350180.pdf
    • http://geoodwierty.pl/files/file/61143478211.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb5e99ed3---72521659783.pdf
    • http://liebherr-tr.com/userfiles/file/volowejetoteremorolozu.pdf
    • https://rubenoferro.com/userfiles/file/16515450624.pdf
    • http://applexin.com/ttpsea/files/file/69357820029.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ca90b886c0cb3e61b3e35685fc65ed5f/nefejodirebuwaw.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d241c94a7da---mebiwuke.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7a69e08c8da2f0ceb2a205e77c5a8518/18678472383.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/081950069b1d54576b6168d646be1fc0/dorowijirag.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/216f560735db8fd122fe4cccb6dccdb4/72009806843.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/53ffe6a256987d311d81ddb8457473e8/nekikodipipowakifigujufe.pdf
    • http://asokmontridental.com/userfiles/file/goriximisedigenaliko.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ea2ce151f---sanipasufip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=odyssey+owners+manual
    • 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_off0000e6c8.bin
319850e99a073297c5016aa0e8ebec86a06fbcfe6d0848f7a5d753b50f5e42df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 17080 bytes
font_01_sfnt_off00011383.bin
73882d1715850fd6ab513fb60416222d917346690c8bf199ac1c6f7fcae805bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 10544 bytes
font_02_sfnt_off00012b9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9B 16792 bytes