Malicious PDF — malware analysis report

Static analysis result for SHA-256 87260b134edb1d60…

MALICIOUS

PDF

101.1 KB Created: 2021-07-02 03:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ab27d2617eec1ee5b132168cd2c2101f SHA-1: d49afc61a25aba570f4b6f81ec28a8976cefc6a9 SHA-256: 87260b134edb1d60c1caa1e697ce638220965590fd3252f36d73f5f3aed0c3dd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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
  • 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.
  • 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=homonyms+of+tail PDF link annotation
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/rojet.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/30736020450.pdfIn PDF document text
    • http://intergeored.com/upload/File/bupamozelerutivovi.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097d66270d04---68644150585.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/zasafuve.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/9705323949.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6957a1df2---26934303668.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16071c65ebda2e---mosokekibunesukanuxu.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/6381667661.pdfIn PDF document text
    • https://peterdegendt.be/file/nakugonusamibudulu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ee45cd0559967c125cc03d5ca7eb6086/tebezififitarelinafa.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607926bee9d20---buxojugapimu.pdfPDF link annotation
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/5cf34aadf92132ae07c5ed3a7aa5769f/lezon.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f60603f5a0---6847686699.pdfIn PDF document text
    • http://andrewclaymonfishing.com/clients/a/a7/a7b0d980ee28df7184f998a87a00dbd5/File/55794236263.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/36b832869ec79288e551740bbd22ac56/fesomapukubokuxakataw.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aaa937484704580d3b10562ae6d5eefa/47042231084.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/jonezona.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2aa7c99ed230a9f4e2c88354f4ffc902/gadubizisifevarinivojoga.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c958c048ca9---67183960407.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//46737053242.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/35d55189638c991ab8cc614107b263e6/biwurilukatodili.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/63195630195.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/92436614237.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/68484230941.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f169967b9f---78008633666.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/8244756592.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B12 10248 bytes
SHA-256: abfa52339ae811335f4f606fe7ab4d7304758e17e82f0a1b8137bc25f20d6d8b
font_01_sfnt_off00014205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14205 17296 bytes
SHA-256: cc6c380464d8722cbd0166e9f8121b600c82510e69fad1dd0dc848b717384bd9
font_02_sfnt_off00016efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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