Malicious PDF — malware analysis report

Static analysis result for SHA-256 f700639b4935cb9d…

MALICIOUS

PDF

73.8 KB Created: 2021-09-28 06:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e5a2cfcc8f09e3aa25746aea4a5b9a5a SHA-1: f6923f3ad4ddea62e84f774b47ff459e7fe7a800 SHA-256: f700639b4935cb9d05902dd7de7be4280e26877d1a17c3f451b673bad198dbae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://nomylo.ru/uplcv?utm_term=convert+csv+to+vcf+android+app PDF link annotation
    • http://seattlebestteriyaki.com/uploads/files/57171180591.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/89940322009.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/kosujupivowometi.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/dajuxurujup.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/56022995963.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/xovam.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/93172792805.pdfIn PDF document text
    • http://zmz72.ru/files/file/85594436228.pdfIn PDF document text
    • http://chinahongji.com/d/files/zetodofazigebu.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/95380944305.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/15715571312.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/91d64be1e0bc3929b349c3b6351f08a8/64025646402.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/85815853392.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/54222800795.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/69815285883.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/sujofitavu.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/78451655353.pdfIn PDF document text
    • http://robbes.nl/media/files/dibefi.pdfIn PDF document text
    • http://showdoimovel.com/files/files/sifub.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/dulitow.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f40188c4e---dowumodutapajatol.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f046d15642---xaxum.pdfIn PDF document text
    • http://farashimirooz.com/files/fewomasusidefivi.pdfIn PDF document text
    • http://reylab.com/userfiles/file/sefibenubiwaxeje.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/zifexudokedivofolebenopo.pdfIn PDF document text
    • https://anyconv.comIn 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_off0000b7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FE 18264 bytes
SHA-256: 06e9ef4ec668cd444acd1691dd23381cf4beac7c5804fe982efe0f15d4399ba0
font_01_sfnt_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 10664 bytes
SHA-256: 2c0117274332d5d52166f9c4e81c0263b0b96b9e51cd8b0b724705c01469403b
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.