Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f14639b4ee57e4…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 09:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9fefbf1a4314f847626701665a269d83 SHA-1: 3ffe7b7627fb6e8b846c2eefbf53d2aa4a113393 SHA-256: 08f14639b4ee57e418c3a8a9f5cacb1ba8a24c4fd1746e15b08f64dfe30731dd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It leverages multiple compromised WordPress sites and disposable hosting for its links, suggesting an attempt to obscure the true origin of the malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to trick the user into initiating a phone call for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/43287cda472b00f27793794a48d8b03c/12558617291.pdf In PDF document text
    • http://polipadel.com/userfiles/file/tejorofa.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/36821286970.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ae5ac64ad---matunun.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/39951676983.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/j0bm4omfifqqsd5gv88uk89u7s/kusokoxaxerizubiwazik.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/hema5neirlnnsb1iq83efmnbt7/58962979885.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c34305a12da---rujobodanavimugup.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/hsfrg6hgpohv3itanid32fc904/61205008360.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/43412877109.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/78876015529.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/79277679594.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/65777692734.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0efb603d89---29184669729.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/cc93f0f786c9a5f658a18376996d8a75/navivowujuvalikojobaz.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/rafiredita.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125557694e01---22621263448.pdfPDF link annotation
    • http://portalcom-b2b.es/img/user///file/_0738680001620122649.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/366edfb2d50c4540bdbc4469035309d1/dusaki.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/fanuxuko.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/gejowufugizutitofi.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/76755530098.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d24052afa---49427449872.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/16158659726.pdfIn PDF document text
    • http://guowangcable.com/d/files/65066128320.pdfIn PDF document text
    • https://invest.pl/userfiles/file/58543359928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=fall+guys+android+game+downloadPDF 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_off0000d59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 16956 bytes
SHA-256: ca2cd980bb3dd021be43c9f8cd091fe84d103811d063dc6a9f61772b3871130d
font_01_sfnt_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11935 10768 bytes
SHA-256: 711abd919585b93d12c7bff9bf175fbb653cd05966f080051d290bccbf4c8fa1

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