Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b569e7e5bc045d…

MALICIOUS

PDF

77.0 KB Created: 2021-10-07 20:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 20e612a70f5a7ae9423dade6dad3cd13 SHA-1: c301e898915e4a317f945e0a81d5dccfde56c244 SHA-256: 47b569e7e5bc045d78ff1d6d0950a28f5f8ee2d6ce64d2f48949c24591aacca4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a link farm hosted on compromised websites, likely intended to trick users into downloading a password-protected archive, a common tactic to bypass gateway security. No scripts were extracted, but the presence of embedded URLs and the link farm structure suggests an attempt to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://vibrator4you.cz/UserFiles/File/lepupagazotadojonepexano.pdf In PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b7bc202da3---27916561867.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/gb695ks1v11omm7u3hutjs5pm8/fovonelosi.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161558fd15453f---98205284811.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/21623616029.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/pogoxuzaw.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/taziruvelimenexu.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f85e5350fe---23656375097.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/13869273454.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/95930026312.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/dilarazerasulobaf.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/mijopufolexaza.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/kupatugubib.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/32481302966.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/69273705589.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/84646624784.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/90751517216.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210910_203517_4758.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/tiketipuw.pdfIn PDF document text
    • https://alpinashop.bg/files/befip.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615ade988d257---vuzakosikasor.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/83849143653.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/kezolenekitovevijofuxalim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=homily+on+the+feast+of+our+lady+of+lourdesPDF 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_off0000c407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC407 18224 bytes
SHA-256: 152ed7dd2b3d7c1f199a2c066479672b2f5ec792f932716aa0dce102ecc58366
font_01_sfnt_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE1 10824 bytes
SHA-256: 572178182349dd2aeec5b480dff961b5d570ebb29558ff3b9a2f1bcd0d8a68cb

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