Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d780ddad0a708be…

MALICIOUS

PDF

78.1 KB Created: 2021-06-11 07:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f4d4ee8b921e318c3a5d61c40e6cdc95 SHA-1: a4bf9b82540db0fe04393996697e04dd3ee91bc6 SHA-256: 0d780ddad0a708bec38cbf0ddd7d1453989b587f61db636b4ec6a7118e42cf33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution attempt. The presence of a link farm on disposable hosting and the ML classifier's high confidence score indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/uplcv?utm_term=charlie+movie+download+isaimini PDF link annotation
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16084206ee4e09---34283133661.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a050f52fc0---walegajunogukivum.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6151673c80a3e18670d932c3ca8b4fa9/37394594966.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc458467fad---bomamoridurilijabeb.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e12b890875---tiguz.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/rqq7t1d2bo5dql1q3sp8ge3irf/7154036277.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/iokh0tv7s6j4vteu4d07pconiq/6276396368.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086565e694b1---17542828123.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2d7e1ac785fa4ff3b5ed032fd0759528/15045481408.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/nikufiwisa.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb3349f636---30677253393.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606febb274c5c---xadobubezufubavuj.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3280c6fb94---pivodepibejatuxogak.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/p7lrkt2ofut6mro2qcko509soq/rikajejitani.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/mpdm3mdfrg22l4u1dbe1fklpi0/nunaronifazusep.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-20/20210520130930531131.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc4247d569---fujipufetuxilelajawik.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/bopozafan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 5124 bytes
SHA-256: 13ff5f08dda3caede901c6967b3706237f407b93861d5faa70e467d74e686b10
font_01_sfnt_off000106e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E5 10720 bytes
SHA-256: c4fbf8d65cefafa53f555cdee7b04695432edd45e651d050d73ef21d65b22bba

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