Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b532b9448c7cf0c…

MALICIOUS

PDF

88.0 KB Created: 2021-09-02 06:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 224738d40887aa4dd4a02dadba39e472 SHA-1: 2d9a62248a2bbfcbbe16465b359fae869ab6c293 SHA-256: 1b532b9448c7cf0cf489bcfd46ed04b18a61afda38ad9d1b8082f1a32c132532
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted, but the presence of numerous external URLs indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://crysiq.ru/uplcv?utm_term=easy+diy+cartoon+character+costumes PDF link annotation
    • https://fetogram.com/images/upload/files/93171855062.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/vokitetirukasali.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0822e4c4---88004113558.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/90780694631.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6e1b80e32---28005355792.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/pevopeziburesavix.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160fa117af1719---43394743312.pdfIn PDF document text
    • http://nfc.soo.jp/file/wopobabudiros.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/47137917673.pdfIn PDF document text
    • http://nakatka.com/files/file/57813686035.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/561acef3caa14c59b1deb9e0ac9bf14d/75822291066.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/vuxetenumebapabe.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840925e997d---96613859582.pdfIn PDF document text
    • https://airbays.com/userfiles/file/94109610816.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/zupevubuse.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/18872535082.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/titudofog.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/vokezuzafivirimokaro.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/desobeleg.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88947d1f10---vopafotig.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/xakekagijiruxugidaxopi.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/0fb91c69ed9df7af375e329202a29f3f/zodifagefukorakosikova.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ktp49cidqdpt0fdb3ps858ofh3/sedisurovapakepugowojafa.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/65082981146.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad51e15c47---8448456400.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_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 10784 bytes
SHA-256: 12021155a8e235495182683483bee6ae2264d169ebe3908ad10663580d43c98b
font_02_sfnt_off00011eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECA 19312 bytes
SHA-256: ab1099b0f3d1d3ad3f1687f1649e56e6f5437c7c341608ae570edb251fb428b7

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