Malicious PDF — malware analysis report

Static analysis result for SHA-256 f986621c9210c179…

MALICIOUS

PDF

73.9 KB Created: 2021-06-30 00:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 861ee16dd0d9287269fb07b0f4480455 SHA-1: c261d4e5bc823af7335cf6579a4d54f0b875dd44 SHA-256: f986621c9210c179bccdd3da7aa9324750be06846a732c1180c2946530349dd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://kitapkaplama.com/upload/ckfinder/files/gozuvari.pdf In PDF document text
    • http://akinmedical.com/uploads/file/xerodegetewopetunomenofa.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/luf59va4afa79ms0raap61nkv0/49599967780.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/tuzefixevevufo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cab6c31c927---38159398264.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e78fe947f---famowegesiko.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/77438437477.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tib6og410hjj804v3gddu0a5t3/95152506281.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/llnk1lcontbq7a34nmndh7ut1v/33815035717.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/9b4c537583bd3e4b49190f1f0b9ebf1c/kifogurozudajezigupab.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608019920b3ff---luwadazirafinoxilezirowew.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///gisubikal.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/sesijofa.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/638g5r7960bpnusa3td7i7s4bb/nolefowabeki.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2e7971e2d013466e215f8816695b642b/fewexomuzawuwif.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/48565512057.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/490f070cd4a878568b33e95c422c6f19/15423008196.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/63572485310.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/4ef41d9c1902399f4bcd205d84810ec9/bavujap.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/4b8f35bfbf2e6f95c19e68de876c15aa/21944083299.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/ebb558939affb4b36ab0fb04883b7190/latokanevomibofudixofe.pdfIn PDF document text
    • https://bursac.net/userfiles/file/mifaduxutoselatulavapiso.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0f667c182---rakezatopatiko.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/27e89155cf09d2b39a9b9734dfda7b20/wewoz.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/975093e41a9b4a5e1ad2789b64af4280/lazizulunulugufaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=celine+dion+frank+sinatra+all+the+wayPDF 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_off0000bc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC63 17292 bytes
SHA-256: 35c35572d903d94cf71e2df2861b2d6eaf1ef0e89fce53ca7c85418fa3c25bd6
font_01_sfnt_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10776 bytes
SHA-256: f91ea104fc15e579a13ffbde9c94453e83c0c4e7abc7fd91db68cdbfad14c36b

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