Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9607cd8491e069…

MALICIOUS

PDF

84.8 KB Created: 2021-08-07 05:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fe68129bdc4dc8bbec08720bec235032 SHA-1: 8f9244b8ab895de344502b575409367c32c44428 SHA-256: 9a9607cd8491e0698e5d8e971ab5541638460b99ceb9b8deb70cfa2291487983
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised websites, likely intended to host and distribute further malicious content or lead users to phishing sites. The presence of multiple links on disposable hosting and compromised CMS uploads indicates a deliberate effort to obscure the true destination and leverage vulnerable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://fotossc.pl/_files/file/25532622042.pdf In PDF document text
    • http://coytex.net//ckfinder/userfiles/files/44745826222.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607340c338c4f---gibefute.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa246155846---48333004992.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/xipubudej.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/bameja.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/35519826176.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/976af257974e1b1e94f27288abb56d32/42724522913.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160720a20909a7---zorixenajiwa.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/17378778849.pdfIn PDF document text
    • http://russia-ex.com/6482978382.pdfIn PDF document text
    • https://airbays.com/userfiles/file/7064251207.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ca9331d4d49a4c9b95641c7d74d85a93/wubuvazapofiludag.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/c2442b762d2c243cba7130b697323199/pejizadijonorevotez.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/zubugaguwanejekojilej.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9b21dd351---polulubabizij.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/d1212afc52152a06039ee2de677c3a27/pukokunefixisubovugasasut.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd068fdbd84---52169587387.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/23677817370.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/betoguwemuxenatere.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c638fc7e42---bugesixugigijadudagudapa.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/54cb572fde366557b422a042af4deac9/lamaganutafurasafederevu.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/51c0a66b47e489a0310dea7af6bc9779/lumasujiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+paper+bag+princess+interactive+read+aloud+by+robert+munschPDF link annotation
    • https://lapdonline.org/file/46186611380.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF22 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 17000 bytes
SHA-256: 943208f929a9808cfe90126da97f2f7319d0e73473ce2e6412bcaa3e277ac6ff
font_02_sfnt_off000110e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E6 11344 bytes
SHA-256: 86f429a10c0d7e504f05b11f926d08236212debecca7dd5e9504e41c25294df4
font_03_sfnt_off00012b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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