Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d058b1de27af77…

MALICIOUS

PDF

289.3 KB Created: 2021-06-28 13:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5a6feaa621aa6827616d1b938b1b3b32 SHA-1: 658f759bc9823c9b13c65179859ade993341ec22 SHA-256: e9d058b1de27af778b8aa2bd06fd69982900b45748942ec54401a2a19b5e97e8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to compromised CMS uploads and SEO redirectors, likely intended to lure users to malicious sites. The embedded URLs suggest a phishing attempt, possibly to harvest credentials or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8857

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/09e2806362a2330f1ca0e087f7893ca4/53132444789.pdf In PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/uhp5psm28ug3ve80jmflm08u67/86271395604.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/cnt41akcor40ek8drbfhr47kbq/laloxalojolabavuluko.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/88b575b8b2f03e1187d2c41ee8ca2709/3954766086.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1a23aa70---nezegodugaroxuti.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/d74c856ab1f7340b5bd5dbe51e2ca028/lakuruzeruvoditofufilezow.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c40cf591---kitomodizetagotebemakusul.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/lamuz.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a42ac2fb0---gadobazatubu.pdfIn PDF document text
    • https://emmaushuis.org/pages/8534638729.pdfIn PDF document text
    • http://prosquash.by/data/wevefefikozigigelukutezuj.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/460716929b3e02b03e8b972fcad0abf6/23056867771.pdfIn PDF document text
    • https://andana.us/files/files/piwopadajisiwupapiwixira.pdfIn PDF document text
    • http://blueyee.com/upload/file/152149593949.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f77391c20---95954163037.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa04e318206---75156393187.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/fanevomosaze.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/tudafiluxipagilesadob.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad733e3bb7---momedevelojalu.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/tolepo.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/31ab252bd9269cc53f720de7f23ba774/6511205749.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/4cgflb2iqe5g7n0enp2qgauoi6/linejumosinezakasow.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c8865c28940---tenatuwajedoma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=one+piece+episode+481+english+dubbedPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00028810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28810 155980 bytes
SHA-256: 06d7fcbf896fc5c8127db51849ab2af5bd851521fd0298b0d6dc798cf387d60d
font_02_sfnt_off00041146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41146 11036 bytes
SHA-256: af4687e5109b514d7fa6df67d67d8e52b8fdff9b6fef0955357a34ea6b3ffff2
font_03_sfnt_off00042a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42A83 17112 bytes
SHA-256: 885b9024a80bd539ee88f4c17c1e1fa3cc6dab475ff5b740ebf17c73a317c9ed
font_04_sfnt_off00044365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44365 18948 bytes
SHA-256: 60ba45de637a9340ad52ea05e7a612a36ab3d4394b06cd2fb5cdbcee4061c927