Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ad409774fcc333…

MALICIOUS

PDF

156.4 KB Created: 2021-07-01 18:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8c88b27872860c056b20facb965e87b SHA-1: 974f0c7ee3451a4c0269fcdedfd123607c20e173 SHA-256: e5ad409774fcc3335b3b41459ecdaac96a777d7d83422e3bdd2676a919b31456
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8767

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://krisoc.ru/uplcv?utm_term=peter+paul+mary+500+miles
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c5ede2e73---95494937687.pdf
    • http://insidethedigitaltrend.com/userfiles/file/lemakidokupaf.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609d393c077c4---20167719532.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/ltc19fd948gimf3uc1f9t0r1bm/96094628298.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070eba6cf812---zefodetokazopixaputor.pdf
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/dogato.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085302bce977---mosojativipikekifapad.pdf
    • http://kapsalonindex.nl/images/uploads/58283681915.pdf
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/negoxoxaj.pdf
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/038f3c55374a3c3dfee508f75848bcd8/92872959030.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/ef6451ceb77788b7cba4e9de83043c29/ronifunemefawimazabit.pdf
    • http://elitaliaweb.it/upload/file/8581597077.pdf
    • http://thetsaban3watnuea.com/UserFiles/file/wofufuriga.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec0378d58d---1585740454.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/67ee220912c68ba85a4d89af5f6465d8/koxolexomofo.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4723cb653169998a04ebc079ca88ad55/41847446988.pdf
    • http://sahrugs.com/userfiles/file/97910154369.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/fa6a71f3b03f03520fe560a27274dbc0/62003059333.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/42b2753f8b827071725b832beafea3c8/91539455596.pdf
    • http://kapelski.pl/userfiles/file/29414572908.pdf
    • https://incoyun.com/calisma2/files/uploads/15637064493.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e34441268c---kizaxazida.pdf
    • http://baigeleather.com/userfiles/file/rovafix.pdf
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/11013875269.pdf
    • http://lumieretvie.com/userfiles/file/91486166103.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/78c59a5cb6828e48a0f1407637501f0d/jelexivatodimuzasetexixoz.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/aa7e99c514dd07be79e874574abc95b9/wimako.pdf
    • 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
stream_004_off0001a310.bin
da91b8f22bcc9194d2cb423676bc1268fb01cdbe138d4de9b8392f7c329ca36c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A310 30488 bytes
font_00_sfnt_off00017271.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17271 16792 bytes
font_01_sfnt_off00018a88.bin
1a4c95c20fa0068054007097bbc7f0db1b13be489ade125a86bff3aa983be332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A88 10660 bytes
font_03_sfnt_off0001dba3.bin
b13e55632cb1906e5d0f50683d1c25a51bbd219a07699f6b47200c3c5be087e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBA3 38376 bytes
font_04_sfnt_off00022f85.bin
cccbd9d432a66b608b2857f8f0b5f09897dbb369b5531a66e311e0d686844f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22F85 16644 bytes

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