Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a74118c4d6152d…

MALICIOUS

PDF

67.9 KB Created: 2021-07-16 21:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 83e114f55947ee310eea2eb3ac693fbe SHA-1: de863e0268cbbb54de8479379f6646c474e1aac8 SHA-256: 76a74118c4d6152d70f3ce720582d3e8cf5498402556fad669fbe26680b18aac
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to potentially compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable binary data, but the heuristic firings confirm the presence of external URIs and link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/v0r08haiet85cgig874pjci7db/laniven.pdf In PDF document text
    • http://4yoga.by/pics/files/navivobisaligojafenuwo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s4gufbf2sq6v629kpgc1pi3q0s/tuxolomowemokup.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/duxobuluninave.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/f726de6debecacb49dadc901734f45a4/toxus.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/bumokafunenobarovob.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/b4d802877d1ae946a21ff09f4ea12316/52517720395.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af9e6912530---pefagagovosobawekazusir.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/86317462369.pdfIn PDF document text
    • http://envigest.cz/upload/file/topabuzunaboli.pdfIn PDF document text
    • http://ropesadventure.com/d/files/76414214318.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/tukurewajama.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b08eb242d40---soxep.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/bccf20bff080915958331b4d43a9ee5b/86938181464.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/89010754772.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/nobet.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/75278496958.pdfIn PDF document text
    • http://mousike.it/img_ins/files/wasowozema.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/jemavonasimuleju.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e56f3355645---lawinuzakoru.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/aa47617995205edbf0ea0b658a920922/biviwukabatog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=watts+to+secondsPDF 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

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_off0000aecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECC 14744 bytes
SHA-256: a54968e147dc7f4df85b5d013714c20ff8c9e62e36bcb6fb3b2630640a5e623d
font_01_sfnt_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 10116 bytes
SHA-256: 3309680b828be7547c40deba887d33dcaccc9bff8ee587feb070876d52e10509

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