Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be8a1bfd15778fe…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 03:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d26ebfd4a4b0a0e4a51ef2614c2e8433 SHA-1: 41f8fa9bd1a056b31f50a7e11615a8bc7decdbbe SHA-256: 0be8a1bfd15778fe9882a2d29996e70ecab9a41692da9f82cc6471590102d0aa
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The document contains numerous external URIs and links to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=find+your+phone+app+for+android PDF link annotation
    • https://makiriaszto.hu/ckfinder/userfiles/files/12132777294.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/wewuzebugebi.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/49428719941.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/vuwevewalizaxajap.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/telefepafaxajetozu.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/16246873140.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210905_BA9AE59B832A34EF.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/fowileja.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/ef5fb4ff8fd9f207f364953054a0dfc9/ginedofew.pdfIn PDF document text
    • https://festacontinua.it/public/file/tarako.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/2b6edebcad4ed38631477d64cc285faa/wodosopopuborap.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/wemim.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/mipiweja.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/mifesu.pdfIn PDF document text
    • http://186086.com/upload/files/minubewosu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614795b41f415---zamazaxuwakupo.pdfIn PDF document text
    • https://mattress-leader.com/media/bamigafiponebajivovijuva.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145800115824---bidusosi.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/xinujiwerav.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/zudonaxugumiwaxisufen.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/83166228625.pdfPDF link annotation
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddd21d06af---53544322107.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/li7c3c97f2dkgd40bv2onhmg5h/dokivem.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/50913366684.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/4480835880.pdfIn PDF document text
    • http://grafitym.kz/files/file/levusiwalalugosaxi.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_off0000d6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A2 10472 bytes
SHA-256: 831388355062d69e56cdeaa12d0be84d6d54d387d6ec31134ffbc87397ac7b1b
font_01_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 18232 bytes
SHA-256: db079f910c4cf5bfb0eb3ce64ee3a27db4a42f693f8643c9af6a6830128eb51b

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