Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0073d90fa79d459…

MALICIOUS

PDF

83.2 KB Created: 2021-09-02 19:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 45bf7eaf8008d1391e0ef8faa57245c7 SHA-1: 0050a4656fcf3dc42033e5f6cff5f32bf16eabc6 SHA-256: d0073d90fa79d4593e40d0e996337c7a5f2216fdee85611f482667201f34da3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/7a0358b060dc8df6587bfee9a5f64b0b/90448468974.pdf In PDF document text
    • http://dermalab.pl/userfiles/file/ruvokotobufoj.pdfIn PDF document text
    • http://short-story.ru/upload/file/gobubup.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210825_045916.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/wetomulumaduroxepajokomu.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0c6fb5e94bf87206d298c43e8cbc342c/25698196316.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ktdasne584t1a0qpsqku38el61/61679777734.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/66rjddmkq6taittd2ti2nbb4ed/38207524170.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a300ba64bf---gowovodubetamosule.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/23015275921.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/40544155396.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe2a32b5c2---31930169045.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9eadc7c03---doxed.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/fb659312062329876c2a1a69e7fd6ddf/bitelowuguxojori.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/66368181276.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/69186921320.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/23939905764.pdfIn PDF document text
    • http://dakmet.pl/upload/42120982225.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161055ff04c07f---xezuwe.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/60830965950.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/favevotizesisi.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/dalakulizeneku.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a25ba37f---46704589565.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/79656540261.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec4c201c19---55799984228.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c244787db---80000233325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kannada+movie+script+pdf+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_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 10924 bytes
SHA-256: 85d24d6bb56865dfc807fe3e967a7a54753dacc6124f42378e9b0dba4fdbd504
font_02_sfnt_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 17224 bytes
SHA-256: 7b5de99381fb205fb1aca7078f39a1068cc07ceab6cebd3c5d783878143daea1