Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bc03adaa85b2de…

MALICIOUS

PDF

78.6 KB Created: 2021-08-26 18:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 01f6a9a06d2a347690e1722eabb63c1a SHA-1: 464d649e9b544d1b5da256b809d2c30b336ae0a2 SHA-256: 16bc03adaa85b2de212b90c762ff252e2a1ae2215eaa6de327fb02b096ccad1b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external links, including those hosted on compromised CMS platforms, strongly suggests a malicious intent to redirect users to potentially harmful websites or facilitate further downloads. The ClamAV detection and ML classifier further corroborate the malicious nature of this PDF file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=block+ads+system+wide+android PDF link annotation
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/9911a3e2e3377855ce86fb8a14525f5b/77413131066.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/24464383007.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/29157877183.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/volegemufuna.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/73670440012.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/40798559645.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/vogetanudasokula.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202108220531555987.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/xolazepevepabalivetudekal.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/51924718799.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1fa9e2c80---60111656216.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b712c380c8---9212869863.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3d8a13242---saximebadawejagesititedor.pdfIn PDF document text
    • https://labelmarket.pl/data/file/bumisopes.pdfIn PDF document text
    • http://liyangah.com/Upload/file/49684776534.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b6ffb1b33f2a58d11a25daad8178463b/liwusaduwivubufuxakalufad.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/36182567619.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103525c786dc---35701821820.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcad068be5---12084160856.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vcepffqq71li2n2fna12ogpmqe/bowoz.pdfIn PDF document text
    • https://giustofiori.it/file/lutudegopebukefeboxuwofo.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/500208967.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/ziwatugododope.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/zuxegewogilagariguderuwoj.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/71182492850.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_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 10876 bytes
SHA-256: be9da3f877fba865484d5e00df9bfd37b398af1f6fb310ac5706351faa2c1f01
font_01_sfnt_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 16268 bytes
SHA-256: def6cdb8a1fd7116cbd6b76f754c8e413d1fe6851ff4d25629df1fc8868c39d2

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