Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab8a2c38050e7e1…

MALICIOUS

PDF

87.6 KB Created: 2021-06-29 03:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7cf10cb0da7f40929e0b1292911c376 SHA-1: b83e4410b145ecc7e3e1f63f31b3f8f9d94cecd5 SHA-256: 8ab8a2c38050e7e10d40109edbe4faebb89f9344ba6972694816b7a7fc8fa0cf
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the presence of external links and compromised hosting suggests a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/gizofosumiziwo.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073f556c4ac1---tofoxekulurabur.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608030bd0e6ea---besazijomukivebepidetapu.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/706683f9922dcf708293dcfaae17447a/33935269279.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160733ab9dcb0d---92617840053.pdf
    • http://dientrotiendathc.com/media/ftp/file/34920652129.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609b53888b129---zelekuwakavikuneramopisab.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/t3b33gvhmblbbmo3la2u8uko1g/27315164433.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c17dfbcb---89947435292.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/zajivipokuralaserawevagi.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/7r4esh3gsh3pr4h3efabv5nk9e/60059262858.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9b77796b43fa52312adeafa6842ee75c/74781089283.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/b9p684raobhd9st7luq1cehek1/suxaxabekimawikororilowir.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091137d361b1---vusazatoxemajikegegadame.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0dcd0815867d719e1fe31d0fd83bceb9/30530157022.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085933a90567---10072534999.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/9fe687f354b9bdbf4e3adf85fd555d8a/28906007599.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fa9f879ab---fenupatolutonekap.pdf
    • https://yalcinplayer.com/calisma2/files/uploads/zivinojilu.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4bf2df35---64186461795.pdf
    • http://www.amedna.com/userfiles/files/petebegefojomubikuka.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=hot+hairy+muscle+hunk
    • 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_off0000f710.bin
5a7e4a8cda5bd3c59e8552ba8ec268a1a65f2076a0ec5e2a66ae43f287b2f69f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 16008 bytes
font_01_sfnt_off000120a7.bin
9adffe70d832b446fb1f982c370b34d362e68a703718c7d68fcdd4da6171f903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 10792 bytes
font_02_sfnt_off00013963.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13963 16792 bytes

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