Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad33f4dbe8faebc…

MALICIOUS

PDF

145.7 KB Created: 2021-06-29 09:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cb22e2033d9563dc46acf6d9165ec9d SHA-1: 3706f1d6946f966fafe403ee12947179aff08a9b SHA-256: 2ad33f4dbe8faebc8f87a615de83f8112cb0df251bbac6093be5385ca98dad2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links reinforces the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9589

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://massageindex.nl/images/uploads/34126020955.pdf
    • http://infinijewelry.com/userfiles/file/47431550885.pdf
    • http://abwlanham.com/uploads/files/namexovixutadirupit.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/e15bfb4a36d4b48b93394f70995eba15/luzosinuzafanetefobo.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8ca09da83---33320935435.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abf556ab9ef---18194192360.pdf
    • https://nestsearch.in/admin/uploads/file/87103351390.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933f3027a2d---sumuxekodajagegiwivogewis.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609445c331cdd---bokunozakegisivilo.pdf
    • http://udmvdpo.ru/images/files/91449076071.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787de403fd6---21338176629.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607383eee70a5---kipaku.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc40d03674---99518699062.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/063074432243214a26fa03c1fd53dfc6/tonelasabegalizuf.pdf
    • http://hzjksj.com/images/upload/File/9019836828.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/141b948797acf15bd9a1e63c78953566/xulefexuxikole.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609895baa3190---gizawikodetumed.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7fb70482f232d3340bf2a2a242e89c38/duxiwidojefoxolovabopebu.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/82f379d7f5024464470489fd02a4c3d1/50664398207.pdf
    • http://challendor.com/fckeditor/upload/file/muruzizowik.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/rejab.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/084388290be9b86faed485ee04511b00/21309316259.pdf
    • http://webursitet.org/Files/file/milevonupediwobazosizuv.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/eed492c216d82c310b020dd359eb4297/vemeveti.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=sputnik+meaning+in+english
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a1c0.bin
a3f489ffe4bc192c891b76541e591c54b8291c1c2f487e9633ea6e541b19869a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1C0 10748 bytes
font_01_sfnt_off0001ba44.bin
d563ebb47c4986f3e8d36bedbb177adfc4c81dd24670413ca2a46fd347bb3b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA44 16984 bytes
font_02_sfnt_off0001d2ad.bin
30227b0485e0dc9350b7247d1ff0bc74eb5b33bba7106f1c34099681168c8431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2AD 3052 bytes
font_03_sfnt_off0001df59.bin
b629eda5341f2889df007d6f924670287494762fd057f54b1daa266a13eb059c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF59 25280 bytes
font_04_sfnt_off00021e84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21E84 16792 bytes

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