Malicious PDF — malware analysis report

Static analysis result for SHA-256 be67007526f92cfb…

MALICIOUS

PDF

88.8 KB Created: 2021-08-14 13:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b24995ea4801bdafb4db81ea65c69dd5 SHA-1: 1dda298192c9b0a04050ceff3ffd6dffec76200d SHA-256: be67007526f92cfb24b073f654f9ada6e64089f98da1d5175f697f15fcb71ff7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to compromised WordPress installations and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://smidgel.ru/uplcv?utm_term=how+do+i+drain+my+cal+spa+hot+tub PDF link annotation
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/ec8f79d49e2513033df6da86b36d2e13/lelojuveterez.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/5a17b686da61c33930511808498d590a/7542779521.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/bfb3a9f7057d5265bc4c7f14a56d6962/jowurapidojibidosubu.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/basivazosatunota.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/geq4kk1vb5ul47vdvdb5tsi52o/nakamubototedeledo.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/53507297201.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55bee013b---58951827892.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/bofmsqgl8b5kpu1fdnvfqmd1i7/25291067045.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1611391115ac9b---46690798994.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/xatinuxobakipesupame.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/vipivezatoworilomuroxuj.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9d6904fe1---80347139338.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/89447332492.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9a7ro7vu44a38tbukmbr04dbmj/xadisutewap.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/92a3ce7407385fabf3a1a654d7b6dbe6/tulumewisani.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/riruvigizefebem.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3a577c288---72862310540.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f97de19e97311bf88e70cfe939e2eec3/57001874819.pdfIn PDF document text
    • https://numberonerevolution.it/file/84591363553.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87009072332.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/wimofofavugux.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/55623458668.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2239dd0de---17648343647.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/fonakivitenakelugesitevi.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_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D48 11080 bytes
SHA-256: d21be597da92b516dffff9e9cdd2147ca78f17db2b0d9c9958ed6189c5d7a6bd
font_02_sfnt_off000126ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AD 17800 bytes
SHA-256: 1795824e6cdc04d49e337f72f2c2ee14aebb5f83f2c3e948ac3f09f41859161e

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