Malicious PDF — malware analysis report

Static analysis result for SHA-256 069ccb4fcb17c496…

MALICIOUS

PDF

84.6 KB Created: 2021-09-10 07:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: abf8cac1c9a913c46289ceec1689dba2 SHA-1: ad8b9d7f7c08abf202c8e5c7c69cb2d7e53d237c SHA-256: 069ccb4fcb17c4962b0065a2cd18b642371b4744732fa676f8709a7f9065297c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=how+to+know+wifi+password+in+mobile+without+root PDF link annotation
    • https://banderlogclub.ru/Files/file/mojukibuvomumiwixifapi.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/narinoz.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/46693995238.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131472c6a94e---93066306701.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/dezipexidito.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/50656809720.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/37997753863.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/fevoxavifowedusewumu.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/mavexiberazivepu.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34010984189.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/58602489239.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210906_B711362D780063E9.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/49425476892.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/dosobagopisokuloredod.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/93294103657.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/xikodur.pdfIn PDF document text
    • https://lapakunited.com/contents/files/97043595545.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210910_5FE675AAFC7C5C04.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/lamekej.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/jizapuwus.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136895ab49a3---jokudiladotaxisojase.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/rumuvigese.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/20a01e162b40d5c1623a7dace1c81f9e/8106308744.pdfIn PDF document text
    • http://belv.ru/userfiles/file/3303743356.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/99757278428.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 11172 bytes
SHA-256: ea06ebe5cfe69ae848ba57fa5730a23d8e743059e345220fcdadd597618bed8f
font_01_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 18448 bytes
SHA-256: b72fe81e4c4b2a8bf180176de52637249b42a2c66e7cc892fac44e8e334b1a5f
font_02_sfnt_off00012c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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