Malicious PDF — malware analysis report

Static analysis result for SHA-256 868e97e1eb88aad8…

MALICIOUS

PDF

84.4 KB Created: 2021-08-19 23:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69d67dfd2a9fa7fdb0397d325194a771 SHA-1: 38df43945358cfcb6ec132fa663eb1eb6616962e SHA-256: 868e97e1eb88aad884b7062d976019e26e7331d9b65b5d83bb15c3230ea9cb36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected 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 distinct hosts, some of which are hosted on compromised CMS upload storage. The embedded URLs, such as http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e74c2aa9ce---suvudig.pdf, are likely intended to host malicious content or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/02031ea251183c8deb7f190bce09939a/50993396090.pdf In PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/54640088462.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e74c2aa9ce---suvudig.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/menifimijanijuwerifolanen.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/bcudocitf9lkf648ib7s16qckv/7217374444.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a05640a53d---4439874771.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/vedegugadesurifulod.pdfIn PDF document text
    • https://everestart.com/images/stories/file/96645347446.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5a6c822d2---87722170569.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/59582701617.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/907af40d2f3b3c7b36eeedd8d7d2357f/70200722832.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/81086281700.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/e0g50ubokfge46dj5kk6jveklk/tisupeji.pdfIn PDF document text
    • http://gabortech.com/admin/file/81991729284.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/dddlmbgalnrfksqa826l1hmt4o/29868408239.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6d4b8009f---jopadav.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/kekurebazikijemufu.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/lanurumovototudegozonofuw.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/72606252466.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/wajaxopalor.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/84f2d5371ea11cdd62dae18e5e44fa61/22360577263.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5dbe6fa11a6edbac7b651c62a247b759/29787868901.pdfIn PDF document text
    • https://noventa.cz/media/files/file/sapemigusa.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c924f42b381---movajisado.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f79bde879---towovezop.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/titesivefojizomajisade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=bass+transformational+leadership+theory+definitionPDF 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_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 10932 bytes
SHA-256: 6c472708cbbd1cfb1ac32abc2e138ba24db321ea50b56062c501258d76575f8a
font_01_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 17472 bytes
SHA-256: ac7a5701c12873a434b96134b9b543dd2944629ea5aabc41b6c4dc24f44c3bde
font_02_sfnt_off00012b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1