Malicious PDF — malware analysis report

Static analysis result for SHA-256 200691dfd84e00a1…

MALICIOUS

PDF

88.4 KB Created: 2021-09-01 11:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 241b0cb798db8b2511bf974d94d9c2b5 SHA-1: 40af7bbd905103c34fa7767738abb4f4088d1047 SHA-256: 200691dfd84e00a1a02fe691ae29bd8218abdfe0506344fbed9e9b21337c0a15
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The file's structure and the nature of the URLs indicate it's likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://huntic.ru/uplcv?utm_term=how+to+get+selected+pages+from+pdf PDF link annotation
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075021ac9e96---nevitidetidarol.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/dodat.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/gezusekulakutukitemapeku.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/nipasalovewivivuj.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8e7893125b8cf5c4a14597f53ff6ad20/nusuv.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/wesufawiwogu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdc36269b7---paderaze.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/xosexidigemopigoje.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2acccdf625---wesedepowem.pdfIn PDF document text
    • http://sakra.sk/storage/file/8048006808.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/47476138282.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/41706627744.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/fujozokiwewunixidesiv.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/61367174894.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aab1d16585---lujowixodunaxer.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/g7t6rk0si12qvkls6gqc4o73v1/96831840565.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/jilamekegolufupukepafuz.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e64690fe3---budumuxezojutu.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/92068611225.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/55493276729.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16087225edfb8c---lolimunakafo.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/nesuserufekojo.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6e8dde5b---97418934780.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/34137970568.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1629709251.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210627030708.pdfIn PDF document text
    • 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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 10844 bytes
SHA-256: 01c1d9108a0df2af48418ea03ffb89eabce44d9bd970fa7c7c5ffe2c99877675
font_01_sfnt_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12201 18784 bytes
SHA-256: 0394fbaf7f5ea5c2e6517e2592b750d3ddad7f8537d8f9d64cb6e8917abfa16a

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