Malicious PDF — malware analysis report

Static analysis result for SHA-256 10de20a9cb56f7ef…

MALICIOUS

PDF

89.1 KB Created: 2021-06-25 17:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 13cab51c206ace2163b73535f2969917 SHA-1: 77932a1c04f8016f3174e1148bbd5a192e79bc3c SHA-256: 10de20a9cb56f7efc21e8b51c83a02e583eb774dc46f79d0f3e79fe35a909741
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristic findings and URL analysis confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://chcial.ru/uplcv?utm_term=how+to+remove+op+minecraft+server PDF link annotation
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3ecf0da00---43582055353.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/e4cjkggorujl2maq9gao6lgqui/sekarukifoxujekak.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/aa9d3729b5e83d9e1fc56342a7126deb/11383142021.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a5cba96f6b7bdde7bd63563d0c1e8951/61972854897.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/jitaz.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/34269328396.pdfIn PDF document text
    • http://builderall.info/userfiles/file/29676572265.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8ebb9d2af---8269061318.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9ab1a6271---xifafabalin.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071de94b6773---poxeweturuzofumupuzama.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/649a8abf7ec3bdd5da5c794d208db62b/97807459046.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/82142792976.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/4di1r939cg80ljg32cdsets5nn/zevurorigos.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/c4cuaton5ibqvvi3luobt54av8/vifirixijiro.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/f09aca885d955525c825ca14fad07a76/pinef.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e26e73372fe82491a50449b8c786c501/dasukajusudiwovenejuwovew.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607b006bdb277---97831175507.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/48820156349.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fda93bc1b---nidixipagamojija.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/27879702626.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608111441b764---gotulisupabiku.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e7e34d122dfc3f3bc86ffa6f963dd864/duzepu.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0brc5d7d63n77e962gs1arj6k0/razusuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 18692 bytes
SHA-256: 8795b330eb528fd6f9fb0bd45fb5ffa98d2a08e3b307e6fec80247cc5e39005e
font_02_sfnt_off00013e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E79 10736 bytes
SHA-256: 7ef74626e65cab770a5b50e948a73b3f4e4e2909e26c6be56971bc68868af3a2

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