Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0af7ce5ab6cfe6…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 02:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: caac13d090ff39815954128322f28308 SHA-1: 085063e8356b1bfd4de246e5159370779fee2aab SHA-256: 9e0af7ce5ab6cfe64b99e6b26be834c8f6f94a18f13c5919242484abe0a6c23f
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware downloads. No scripts were extracted, but the presence of multiple suspicious URLs points to a distribution or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609daeae1045a---genazanoxazisikuxitifo.pdf In PDF document text
    • http://be-now.pl/userfiles/file/tasavilivopolorosudud.pdfIn PDF document text
    • http://markone-tools.com/upload/files/62033277565.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/tutelezuduketadoxuzel.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/5c85f1d140cc089dbbccbfd842662e6d/lerubisodibu.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84506566394.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610586367bacb---tanojenefejedemomowaro.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4449e6dec1---saromelerigovonutelefi.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/71422444990.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/2798563295.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e6b8ce75c---28374508270.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/7756872354.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/d06dc11a40a43c76d08260c7e9d8ca8a/86063861076.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b9dc475f8b---xusude.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070a062ae748---duxezaxivamimudad.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/3841460481.pdfIn PDF document text
    • http://954move.com/clients/4890/File/56987342679.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/76861915977.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/74151016804.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16074b1e2bc7ab---zonigubixawi.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/72959283471.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/pibitufisadidanabaxepil.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/81bd43675d3d64556e7c77146145deb6/45713804484.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/e32asco84e5047irp8ivhjoma7/letoribule.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/86986309446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mazda+3+2017+repair+manualPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 18528 bytes
SHA-256: 1d7dce47b0904f01c7bcdbdac54488c4295ad7f951f4389dcf806c7fff48f01c
font_01_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 10836 bytes
SHA-256: 67b097184f7487b1ef3bd97115cbea81f3ad4488b5501ce1612af7381f42211d
font_02_sfnt_off00012067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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