Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f50129e3729516…

MALICIOUS

PDF

91.0 KB Created: 2021-06-26 08:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 230e508c477a8e50ddc614260788945e SHA-1: c8e279199092c0451fc5773aec8d43f6e3c7b7cd SHA-256: 12f50129e372951655a97900ce7a72fbf01db159902b3faa1401a0c0f2b71122
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and the use of formcraft/super-forms plugin upload directories further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ju2qr7a2ahoddthvt2orfgj0e8/sipiwiwut.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00fd16cb85---92132022850.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607790261e107---gunovowinejeduvaluxeni.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17b0e2706---bexawupuwog.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094684fd1105---rezirorugonomadejorat.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/pt21h0bqi8tj6cv53d2sqs2i8h/88754997426.pdf
    • https://glbtrader.com/userfiles/file/mepitopokelewubajej.pdf
    • http://chikatere.com/Upload/files/gufosidudi.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075626cb7d01---47258854.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/822c4e0a6a9185b6235bf5c4e0190d0b/69338037212.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a84d38f3ee---mabejozagidokorob.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/786ad184e37a5f4bcd6b69673330c35c/buzezagabupusawa.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e631aef4d---98853968595.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/1fb12f8f8620ddb51b10f8f45f605764/34946600416.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ce1siuvdcv6ats0a62tq2qf3q5/40834815857.pdf
    • http://perlawarmii.pl/userfiles/file/62536232424.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0ac73ce7e---loletabunutogubu.pdf
    • http://netmutum.com/userfiles/file/womowo.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0c3eb666f---julitadoxekefujiv.pdf
    • http://antoniolescio.net/userfiles/files/jovirebinizubofitedezi.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd0e117f26---zufebonesabesorekivitonu.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/adb16556a7615f54d7429c196913cd8e/liwukisamomefagurukutipor.pdf
    • http://geose.ru/userfiles/file/15692073276.pdf
    • http://asupuro.com/user_data/image//file/pikuxo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=have+a+great+weekend+too
    • 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_off000101a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 16792 bytes
font_01_sfnt_off000119bb.bin
ecaf7f606c312656a5c6069aea6cee9d1a488f0a220cb7fc6840e65674a779f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 17760 bytes
font_02_sfnt_off000147bc.bin
376dd491312563b38e2dd21ae4b5351afbee37ab45114b555c7e7d27828078dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147BC 10352 bytes

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