Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae46a0aa0446a231…

MALICIOUS

PDF

82.0 KB Created: 2021-09-08 06:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: be64a541287888f1c1c68ff2044201d6 SHA-1: 6f6e8e9d191e853d6a47b8d76681e20306ee64d7 SHA-256: ae46a0aa0446a2311225bd60ed53c6fd72a247bd689a5e842d874b859c79ec8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS uploads or disposable domains, suggesting a link farm intended to redirect users. The file's structure and numerous external links indicate it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://tavio.su/files/file/33210446878.pdf In PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/lokafojavipegubetofab.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/727450090.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/hp8gr0kgle2b5dv9jjh1gpboer/62595824608.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad10a7e7294---68268002235.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28c088aaf7---mesapobapetulawuseba.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/80124359796.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/922278eeb7d92e3b79d9dfe6244ff90c/32622652782.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/81940113702.pdfIn PDF document text
    • http://landpas.pl/upload/file/33989408407.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/29b92d8ee5ce7910728bae3e02689cab/53772014611.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/bupavapuxudibenadixezisem.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609425ada3892---fiwojerojedogamum.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072463a323f5---zonizixowuzumulix.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4fa6e5461---49731479981.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/zofotovoxab.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/93559980404.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/86888968521.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612018b538f7e---perev.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/gagemage.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b8987c64---66452002122.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/kulawojuburatetipegabi.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/fc52f771121446be9366be2421fb5fa7/58209004809.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/97654631480.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b51b0abfc---bozekoroju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=telecharger+livre+developpement+personnel+pdfPDF 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_off0000db1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 11096 bytes
SHA-256: 81c34477118557337520354802b64e41bfb2c75d443938538d3c526a91af56e7
font_02_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 18248 bytes
SHA-256: f10b1d789c049b44cdde250aa88682598d931b36463fd6da0854cee7f0113666

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