PDF malware analysis — malicious · 86922d1f445a96ae

MALICIOUS

PDF

80.2 KB Created: 2021-09-05 04:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01

MD5: 73b2654e5177852422a24a3543317dc9 SHA-1: 5c4dfdd2b87bc20efe8e94f1bb0e572d6f1ceca5 SHA-256: 86922d1f445a96ae66c3d348d94095b3f81fd77710eeeb294bfa280c06395f8d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://www.colormotion.cz/UserFiles/file/nisekedokodazunefugodon.pdf In PDF document text
- http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/37ee8cc0dabcdb341616f699175fdb21/tevesivefatofizifi.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089de41c61fb---95061109849.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d824f847efb---57076609942.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4fb5660df---zisolusososudiligefos.pdfIn PDF document text
- https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/fea6c149a4f999df5da5fb812a353dee/vixopeti.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d0af66e402b4985287ed946bd16a6149/sidamew.pdfIn PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161234ac386fad---sonexofafizuxajumogejev.pdfIn PDF document text
- https://indianpowerliftingfederation.com/userfiles/file/7194009060.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d52d2b4112---88267852691.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/37c317b30a4b42252c3e3a01c7470aa1/65169540679.pdfIn PDF document text
- http://meble-tk.pl/userfiles/file/40155083103.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078612e0b32a---46809650419.pdfIn PDF document text
- https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/netowixob.pdfIn PDF document text
- https://flyags.com/editorResources/file///dokezizafigiguku.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/a25l6j9nrb1ritj0d23gdvde15/55316753647.pdfIn PDF document text
- http://valleypainclinic.org/userfiles/file/42235483973.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/36c4a89871883da23c64339e4a24fd8a/ziretawiwidodipetanojur.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce64e9de498---dimenejazofadasusug.pdfIn PDF document text
- http://valeneighbors.com/userimages/todegu.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/pt7md07k37uqt1dmkv7hbil8gn/89244244932.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/edd752fc9df36f75643699fbf808d60b/xufifebusupelutedadusaje.pdfIn PDF document text
- https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4eced30bd8---filabadig.pdfIn PDF document text
- https://isabellepieman.com/userfiles/file/89374680036.pdfIn PDF document text
- http://fitnessklub-impuls.pl/uploads/assets/file/76678601953.pdfIn PDF document text
- http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/95ba5f73c526cfa444da6a5fa5db10df/kikuxoxevadoweno.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=rajasthan+police+question+paper+2018+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cab4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAB4	11640 bytes
SHA-256: `29cf83506f4c8a6cc660f5743e5835853a717c34b9e85f5ef8660154d1da5102`
`font_01_sfnt_off0000e62f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE62F	19956 bytes
SHA-256: `7d4116bee6d6dad1863eedd3c496dfe744874fda1277e2ea058264e926cfdca7`
`font_02_sfnt_off00011ab6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AB6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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