Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f80ea1b5b0b45cd…

MALICIOUS

PDF

86.6 KB Created: 2021-07-07 04:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0370589d03d6b490e8f9dfdc326d6552 SHA-1: 3e81520e309c8ebd20d0e51ae0c9771a25f49023 SHA-256: 2f80ea1b5b0b45cdf8941a616ef06eeab3027847195483d98b8c714935da02c1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of links pointing to compromised WordPress sites, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818d45eb46f---52969683934.pdf In PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0d22b6e730e32d1a91310d8eb0ccaba9/nobegizakawel.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/49941636218.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c81b759249---xuxuso.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/0b0e575ff4e763b1197ad173437fa140/65434164479.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/jaxagopovas.pdfIn PDF document text
    • https://premiersuli.hu/files/files/puxisitofapaxugevupefab.pdfIn PDF document text
    • http://computerdoki.hu/user/file/vadonolidewiwigunomofiru.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a49a3f2a091---7091329466.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/70779391903.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608576c9a7285---gikupuval.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/titodijabedeginogafitil.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/28843788994.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/99285763274.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/92413814442.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/52786786215.pdfIn PDF document text
    • https://dm288.com/slicice/file/55172439169.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/56153068746.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f2555957e3393902cb0c318a1ec6e34f/9391340039.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/d47321d697f61ab841f368775841b547/66602149672.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de541e8012.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/o8vlc6ferca708os6caqdb7kur/35001115184.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e326cbacfe---53218111293.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a0f2cfde6---93806966141.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/vatekikowobadimix.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/fawujelobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+connect+alexa+to+another+speakerPDF 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_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 17436 bytes
SHA-256: 916516907fb625577790696b6cac5e979b647ab5abf4334bd51fbf5956c81905
font_01_sfnt_off00011c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5A 10648 bytes
SHA-256: 2b43e15fce8619d92684662686cbb5962aad5871c9ecd7de79b4bd61364a082f
font_02_sfnt_off000134c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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