Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee036e7e88902fd9…

MALICIOUS

PDF

86.4 KB Created: 2021-09-10 19:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 18888befbd6b736135245bccbc038148 SHA-1: 5334c6fc7dcab90152249ce0c5c9543759e37acc SHA-256: ee036e7e88902fd95d0942f33d9fbded8ed3f0b69e4531a51f560f4861df3acc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=which+country+has+the+biggest+land+area PDF link annotation
    • https://idd.no/ckfinder/userfiles/files/75296574508.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210907160058.pdfIn PDF document text
    • http://laduses.nl/image/file/92215167079.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/61352874506.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae4b15ddb6---widotabinugo.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/5977609610.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/17206619405.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/25357784796.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/75060114647.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/moromujuw.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133342bed50c---zimigevebufipulafovekibe.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b71eeb854---wogivukemuxijel.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/80472647859.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109041218015058.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138ff7eb86f7---jokalojolurixibogejun.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/83534872107.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/616235697.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/70124953805.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210910185932.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/rodexu.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/vesetebixil.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/4055736724.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cbf9456be---96962390783.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_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 17972 bytes
SHA-256: 08b5e04a761600af6c24adaa8ab806908a40d0d5fb3b92a810f90cd228876977
font_01_sfnt_off00011a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001325e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325E 10996 bytes
SHA-256: 32c962c53123107d2f9c3aa096a188ff9ae847abc32cf366cf1e0b09764b21ab

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