Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e7c94c6e1f5481…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 10:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a9ee39a15052bec8fc17eb8122e3a8c4 SHA-1: 5c63600e1ad4a251270b19d31c4d060cf6ff3a62 SHA-256: 98e7c94c6e1f548182ca8f5dd77576508907b59ff26be760bca3343387a96576
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, suggesting a phishing or malware distribution campaign. The 'ClickFix' heuristic indicates the document likely attempts to trick the user into executing a command, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962ff3e0b37---52185056676.pdf
    • https://efnnma.org/files/file/87519389798.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bec1a39d4c---wurisenesataxidazopaxo.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/709njbogo7gnnhcevl4p0tr95g/vowifelepugajefo.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6dc5882e---kurefaxuruxe.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e10a2327---sewikoxuladozuwe.pdf
    • http://2ds-creations.fr/userfiles/file/69486593846.pdf
    • http://jrmhandling.nl/upload/file/61488240055.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9ff39cbb0e941481f41d86c27aef392c/mepiledenisenowi.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2415ce22a---zepebavavipen.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae014eda303---jarixodesuwi.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/19525d7323200499e03659d760f78825/3989260029.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a11aac7cf0f---zobarovasozipomilofifezim.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/dd0bc63f923acbd17f8677b68d738a64/58288795070.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/91lfabh2amtb5m05vel5piibft/63597147789.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16091a7f611c7b---46551153477.pdf
    • https://retrofitoman.com/ckfinder/userfiles/files/85734644806.pdf
    • https://uniontend.com/userfiles/files/46147055423.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/oqjlhahrtkt7ue7lco2fpq2262/62652522217.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/49e27fbeeacb8187db5127b4dcd3a53e/83770900327.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/0bc4f0e5d4fb035e00fe06908caa15cf/14783357249.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+can+i+connect+airpods+to+android
    • 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_off0000ea97.bin
6609f42104119aa0178a47c1b755615cc1ca9323ab60aaa819d54e69b690088d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 17660 bytes
font_01_sfnt_off00011861.bin
6685b4f13e56237b9d443f452360948d3ea021b97f0a9bcabc73f89b7ae203c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 10536 bytes
font_02_sfnt_off0001308a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1308A 16792 bytes