Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afbd7d2a2d27d07…

MALICIOUS

PDF

86.4 KB Created: 2021-09-03 16:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e89e5532c427deda507f0e95e4073dd6 SHA-1: f6bd5c39e8b97c82ee1c70f2c3276340ccbef437 SHA-256: 7afbd7d2a2d27d07e077393c24c1a75839708ee693984d48909a7583e4a270c9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised websites, suggesting an attempt to trick the user into downloading a malicious payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanners. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=saptahik+bartaman+pdf PDF link annotation
    • http://albarossa.jp/js/upload/files/reletupaleketi.pdfIn PDF document text
    • http://tochalco.com/uploads/files/kowaredumenipu.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/0086116b904f633ac8f7a47329261961/pumevaligirage.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/cc00d5afd6e8f4737d8a9aa59c6dbca8/misijutonedegajejori.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072eea5cb5a6---25189520599.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/jevuvapabesiseje.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608112381deaf---tuziputiviwekupi.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/i5jo5tbphogf1aoecncvgqdbnk/fufalo.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/wolarafozefuf.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ab7dbba9b---54588402295.pdfIn PDF document text
    • https://austarpharma.com/upload/files/13764601423.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/bopogiviserevup.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099f64d7925e---74514751509.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/9agau52f8vah408crq49ovo2k0/xugijesopid.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b32f3c446b4---tiratonovamurujinegi.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/98665171717.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/1130213201.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b489e9f74---xesogeguzafuligenabez.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c83fb9a4c6e70bff51d2daaefe83ec94/38772662702.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/zabimifimalewibibe.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/norimetinape.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210531015426.pdfIn PDF document text
    • http://techhssilverbuffs.com/clients/61416/File/mukuderorupumemamukagapeg.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 16676 bytes
SHA-256: eea8495bb70cd6d40c3c25e04abb9c00480a06023d05f176def22c90337bc499
font_01_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 10604 bytes
SHA-256: 2bc2aa7276cb2feac174506c9e7563fe76d7abb888604f51b75e8f2e9ee3233c
font_02_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 20712 bytes
SHA-256: 95245ccd331a1fd1a4f3119af89b6688e7a3435e83eec5068ca2c0780d5b991a
font_03_sfnt_off000133ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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