Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe69e02f1ce2c62…

MALICIOUS

PDF

80.2 KB Created: 2021-09-11 01:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 399156cf68cf30de3a46a7bc489d8e66 SHA-1: 1d821323672fd6e00c3b409f32e52b755569512b SHA-256: 6fe69e02f1ce2c62dfd1d7868d8824c3902fc62991982bcc3fa7c12f0d07abe1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=best+mp3+downloader+apk PDF link annotation
    • http://devveb.net/userfiles/file/92842997493.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/80489965014.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/zepufezolusekazovela.pdfIn PDF document text
    • http://ggbris.com/slbdavbatala/userfiles/file/xudolepusukaf.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161321b3fdbee6---13760203984.pdfIn PDF document text
    • http://hanyuchina.com/upload/files/ribilekunugi.pdfIn PDF document text
    • http://freeorden.com/media/file/93894890356.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbf0747ac9---93953948263.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/65411843773.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/lelopegatopo.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202193105318329.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/weseridipuxejefesavax.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/22735106937.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/42725467280.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/23163592315.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/70680277619.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210905_15F5C47DF9C525AA.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/75962660742.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b41f654db---79839413076.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137930aaf277---libabo.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/xejibinumubusodusi.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/69951959493.pdfIn PDF document text
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/bunukimebusoxosov.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/73456630309.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_off0000d49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49E 17708 bytes
SHA-256: a97dcfc866116e827ffab503d2695579e3fb2127c6b268dbff926313b0e7bf4f
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 10864 bytes
SHA-256: d53739bba2135c8494cc6916ed14388a641a627568a97abcfcc2707b9cef1d8e
font_02_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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