Malicious PDF — malware analysis report

Static analysis result for SHA-256 883a67678e51c1f2…

MALICIOUS

PDF

77.2 KB Created: 2021-09-20 09:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34719e696255a9cc5f1515da478a0b58 SHA-1: 4d248162d04828d347baef160b3cde21e31894b6 SHA-256: 883a67678e51c1f2fb0bc5a9470e3ce9ea8b42f2d769e5132dc7b1f939d91f92
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on compromised or disposable domains. The primary function appears to be redirecting users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=how+to+install+back+button+on+android PDF link annotation
    • http://www.chatanakonci.cz/userfiles/file/makamedar.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613889fd0437c---77543801516.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/sakoxifipagagetumowawerad.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/kusinagu.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146cb8095163---64144482379.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/74920015483.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/97897742673.pdfIn PDF document text
    • https://pecsikult.hu/files/file/95319995648.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/53698760602.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/50866009174.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/53860587116.pdfIn PDF document text
    • http://watchimport.eu/userfiles/file/fefumotevam.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/9oue32j2iditqrqi7qc10p1ju4/dojex.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/10564868850.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/60473272014.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/tatevasonapisodewi.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/zaralusezo.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/zixevakobafuva.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/522829519.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/nezasamubofagufe.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tubghu1hc98131pct5o3ijakj4/gixas.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/96963066879.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/27698948764.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E1 17152 bytes
SHA-256: 3e65e57e71ec597150b3bc77adfbac730e41a96ecaea7871e997a4c6580f5586
font_01_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 1948 bytes
SHA-256: b033f7fcbcd390b2cb396fbb5f03ef01f7ca9afc151f9d9df21604321f961cfa
font_02_sfnt_off0000f62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 10640 bytes
SHA-256: f132427b10e4db9d751e242c0bf2d1bd8e76f9838961c60028a137ee6117561c
font_03_sfnt_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.