Malicious PDF — malware analysis report

Static analysis result for SHA-256 be59c70f3155233d…

MALICIOUS

PDF

94.3 KB Created: 2021-07-22 01:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: be464428aa081df62162205d9b1edc90 SHA-1: 89f3b615cc90c147ab385755bbcfa9e539e410ab SHA-256: be59c70f3155233dfe489f80e6b97847af87fdf4bb48deac93b80d296e44c283
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://atl-50.com/files/file/wuxudaniv.pdf In PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/d477u1juvnl8o27vtluis614ha/99225754501.pdfIn PDF document text
    • http://builderall.info/userfiles/file/73584227611.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/45730749431.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bfedf504f96---dutetebifupitajesit.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/94831885951.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e6e8c620---79878432365.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab2200917c---simez.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f9a2739bf---27421283429.pdfIn PDF document text
    • https://stopserv.ru/files/file/kobebitidumo.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160894b1c886cb---61334276167.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af973d9fc3b---19372123442.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/xasutikixodamimugarom.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/zutexikazo.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/64r7cq7tl178jmb0tkdg4qfp32/mositadalinirewazototinav.pdfIn PDF document text
    • http://pi-consulting.ch/download/93007494137.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/6593844274.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/20339737158.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/farurapemop.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607260961f97d---61990976908.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/zelakawumilosofofawatezo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c951faeaad9---67177531799.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/55416981533.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/35846941373.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/74136357283.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160732e5a65822---tofiloj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=medicinal+natural+products+a+biosynthetic+approachPDF 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_off00010977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001218e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218E 10956 bytes
SHA-256: ffeaad7005c377836489ddf3488f97605720a69a2eae5a7fd7e7dc52613ed736
font_02_sfnt_off00013aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAD 17848 bytes
SHA-256: 49ac108cbb3d0ca3b0e34c4bdef607e9e80a3e2d188ae010f35022b5724a1c8b

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