Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2afdffa10bf7b1…

MALICIOUS

PDF

87.9 KB Created: 2021-09-17 21:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f82cac607d56caf7244f5bf0674a372c SHA-1: fb2b56aaa864e057ff31e85ad14ed1f7fd1f9349 SHA-256: be2afdffa10bf7b14f57017d444b333a74b0ac7b9a053dad64ba7f1550fcc6eb
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/tezowixolowuwoja.pdf In PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/8edca859468857bbd7222decda0bcb00/99249538026.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/58938893432.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/877a03dd6dee4c92cf3ec26d01ac3614/62056296772.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/korifemijozisawipatejuru.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/40747853691.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/fepamoluxabadak.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/jalozinopitevakafetuwovu.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/rizefabazupifun.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/sagavulorugajabemogivoteb.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/nopizuzemenuwokirekor.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/nezisabupefinotefetotob.pdfIn PDF document text
    • http://k1a.ru/images/files/file/87456609087.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/sukunejasob.pdfIn PDF document text
    • https://anup.bo/images/files/numal.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/nosegifa.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/zibolume.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/sodibelelubuwokatomafeto.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143a5ae2c076---gemulebatoto.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/puvelujapimox.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109162237022717.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/91795276690.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/vuwikageleferixotemeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=inspirational+words+start+with+sPDF 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_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 18548 bytes
SHA-256: 532331aee175d5970779c969c23a0215c936a91c753d3b354bedbcd6be288ddf
font_01_sfnt_off0001227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 10392 bytes
SHA-256: ce15bb469bd7a5075efd40924029f8d57bccb7ce05329988599b27e4e0718173
font_02_sfnt_off000139f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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