Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e26b68f686b3dec…

MALICIOUS

PDF

79.0 KB Created: 2021-09-11 13:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7082c533c66df8dab0d0aa24289bad83 SHA-1: cd3e8499bb11f795f13d5af3c8d6e90e163f98a7 SHA-256: 0e26b68f686b3dec0241928b9447bfb7249b25ed35aabe0e03a4b2da7db8a0f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs pointing to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on distinct, low-reputation hosts, suggesting an attempt to manipulate search engine rankings or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://dadesigning.com/daduserfiles/files/sewebezimilajoje.pdf In PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/zemutidupexisibekolob.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/fajukup.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/94882906109.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/dinewemutefajetazidokemik.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/jumegakejemasesoporo.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/84408682833.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/e51d6f6a8f65baca5055096622ba1a68/16458065122.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/rifelodapivo.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1613b90a6dc1cf---85639842974.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/8527136186.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/16635901850.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/55124173233.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/827c3b4f8c6f014d4139ccb2ba745dcb/bawinupo.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/48768128968.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613892b514704---solekasinevepiloxogako.pdfIn PDF document text
    • http://patroha.hu/file/77474540629.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/51462061595.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/lerixixoluvamofobol.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/45249119589.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/zukodaxanokinuxekot.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/kobevegamaxiz.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/77643937177.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/gozemevepedijoxuw.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/radiligomowifojutololuto.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/33858906563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=2nd+us+phone+number+apkPDF 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_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 10776 bytes
SHA-256: bd6d35746c31c6a911fd6a814614070eb9a06112d40c99e61ba43769703e6430
font_01_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 17088 bytes
SHA-256: 07d736ab2a13ae228f8107a7dd282fe5353974aeddb0fe6ebcce1edca91aeb35
font_02_sfnt_off0001162c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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