Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc21700f87a0873…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 06:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c9f71b63c5acafeb637c7d455551e2d SHA-1: 6c86d9901b40c58fce3a6fbb560632db8043e5d5 SHA-256: 4dc21700f87a0873e2c9dffc846cf801e65e1d30c3b027de4407d8a37e282f8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, specifically identified as a phishing trojan. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing lures designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8434

Heuristics 5

  • 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
  • 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://motty-etai-sharon.com/files/files/tavobadozulujusuvi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3d6b2dd11---lirofaxizetiremutobab.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ce60649bf---38613218877.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160cc04011c875---dofunajew.pdf
    • http://ropesadventure.com/d/files/30082121872.pdf
    • http://limuzine.md/userfiles/file/17583506792.pdf
    • http://katyababash.com/images/uploads/file/vesutukugepekilu.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4d1189aa0---rusenuvosexazuvitiver.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16078eeacd6b26---63144696466.pdf
    • http://puebloexec.com/userfiles/file/wetimikatasofafikipefif.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf7aa3a0b---17859066062.pdf
    • https://llibreriaha.com/img/events/file/76609523152.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e0bbddefb5---jufemesakikeveworoza.pdf
    • http://satbietthu.com/luutru/files/minizuwulapowuvo.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lba98a348pmn4iclveo8011vn2/73589609876.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/nekapofofaroraxokuvuz.pdf
    • http://palyavalaszto.hu/teszt/upload/file/zapesilidilakik.pdf
    • https://tisuputih.com/contents/files/93869131893.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/udmjionmmtq706iiqhavcq8jcb/35837926696.pdf
    • http://ff-engineering.com/userfiles/files/12046432194.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16091ce615876f---nopepadopilixomim.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3042e9629---77363384964.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160939fc6a8849---tavilobufipujipo.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ad166486989ce609c9b43b498fe0fa60/14690926794.pdf
    • http://uniroll.pl/user_images/file/74503270672.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec2ed0c20---vakodaku.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=best+pdf+compressor+software+free+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 16792 bytes

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