Malicious PDF — malware analysis report

Static analysis result for SHA-256 95832b708513d703…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 20:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 443f34e3c096508bbc1ba92792e9da4f SHA-1: 7c2f58f239becf2958c20940ed0c8d3ce7c42c59 SHA-256: 95832b708513d7032ebc4cb4faa37ef2ef2e480e066588bbd67ad091c25e2f83
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and other domains, suggesting it functions as a link farm to redirect users to potentially malicious sites. The PDF's structure and the nature of the URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1be3b39b9f---pizipipizaposigupuwakate.pdf In PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/c14m6j0b0g781hjj0ep1d58eo3/xasuperujaguvatura.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/bamibaliwikut.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/xonunofemeg.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/58ql3q3af5bdjqn159g35htpe2/kodinugaxuratupezumited.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/96737772188.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c1709ec4054d7ad756153c3b6786baa9/fozesoruzololiga.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/jumuxisokegizenugix.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/wiwifu.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/38346996155.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/71964338096.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16070503aab83c---sipuneramosuvorur.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af66e63da9e---46072900043.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/jipanu.pdfIn PDF document text
    • https://eternalbliss.net/file/77180138007.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/aggoel8gkvogj4niprqi45or32/gekomilukelejevade.pdfIn PDF document text
    • https://mmszke.hu/files/file/83672310745.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/zolarubemopatuni.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/xafosuxivanogexojefobikiv.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/sowedagawe.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ll80rsfpko5uvbt9kvhaj3c6ou/xuxuvenuvedumize.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/lulenagufixalib.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/wetimazepopefixiwebabis.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3bf868db1007c8df8d850987df93c91c/remugaloleluzoluvivi.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ec4f6e5b9---motudawovavo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=semi+automatic+capsule+filling+machine+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_off0000d962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD962 17184 bytes
SHA-256: f92e1de1b0a0829a9155e995ee54106d66f89dcc6ed157ecd12e8067e4a7b693
font_01_sfnt_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E42 11004 bytes
SHA-256: 1f3857049ab90d20979fa8cf08cee46f1bf0ef9c1f5d8c7706b3951eae6eb28c

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