Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea20f6d8508d863…

MALICIOUS

PDF

100.8 KB Created: 2021-07-25 06:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: b98e2e6db2b30afcd1f7338a5ee5fc51 SHA-1: 3dad5b62ceb31bf274b82639750b2e5b8e4d325e SHA-256: fea20f6d8508d863057f7528e1d025ad8e50c79ebd7da3939d48b031ac5c6859
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to potentially compromised websites, disguised with terms like 'bengali recipe book', suggesting a lure for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content, likely hosted on compromised CMS platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

Heuristics 6

  • 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.
  • 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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/cgq634g154jki5amgf5rtmfl1a/29735228518.pdf In PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e046a28e857---kimugezafejogudeginel.pdfIn PDF document text
    • http://iphysiology.ru/upload/lademuzu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/d041387586299c59482d871c4f99e8d2/3497340109.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/63580932226.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/20587532037.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098269c43e8b---vonudatotepomu.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210716114250.pdfIn PDF document text
    • http://rayanchem.com/d/files/xukusikedasibi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160972db35496b---86664747028.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/zorisivifa.pdfIn PDF document text
    • http://gibisch.info/files/files/venezodorotuwikas.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/f37mdbagiloeegg9o8517jj6kr/83051365373.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/refuvagotaponetuwezus.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/fenugejazorisajalili.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/1f20c453575fe9167890debf7ca4bcfc/gorilarisakurutulalas.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f4361dd92---51243498725.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/0a6143478759d81582ef07c6f4b4a418/dobifi.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/a5ec75e65d9663ddc7ff94e5980c90de.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d88a57c3e1---60660745511.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/15f315504a25d0fecc571c00ad74b694/zozugi.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/xulubonuviwuxikogiwizediz.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/54146f607ec506c5d9f09333461fb177/77214259293.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/roxajaburufejoweba.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210510083025416927453.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/578399336.pdfIn PDF document text
    • https://reniuved.it/file/zilopabatevaxijowinususan.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/875ae286e59989eb49402034cfe713b0/44065221889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bengali+recipe+bookPDF 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_off00012600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12600 10568 bytes
SHA-256: 4fd5ea8a89b5eec6f9bbaac935efda7a676a63e795dfa55c559e1437e917d9b4
font_01_sfnt_off00013df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF3 18120 bytes
SHA-256: c7d9eb566b89803f5b64258512352feebf83a305abed886499b7140a3105f726
font_02_sfnt_off00016d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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