Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db3f2ac61a5595f…

MALICIOUS

PDF

85.6 KB Created: 2021-09-13 04:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1bb9edbec62eac274303e5647c3db6c9 SHA-1: 19f9f962722a0814d9b60d64811890eb2d6f8d01 SHA-256: 2db3f2ac61a5595f2b0c71d20b2e0630e625084d65e301232d20ef2a9649881a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • 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://www.pactforfamilies.org/ckfinder/userfiles/files/sukidipulavotisulinetuv.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133b6ee5dede---63094591428.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/98035532689.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/namefetufebemerenut.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/vexikaxe.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/59686925361.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1630905114.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/90816561741.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/befoforaluf.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133000454c8b---3566102147.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e7099a30b6b91213f11377cf74c1cfb5/59286360583.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/jpip9g3qkjj050mi0ss9ltnppr/bitaxekidituxavu.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/79640929903.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/23425086031.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/jefovole.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/65251471467.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/50207700668.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/ragisekaros.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/43358554992.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/fomatam.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/jodenukun.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/66640676520.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///70803432664.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/fojuxevolon.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/23103695560.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/gutatawujediw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=protake+pro+apk+modPDF 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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 19664 bytes
SHA-256: 175dd2917eeb0247fc8625073189ca2ec8d48fb67338f1f696cf7a9eabb5c504
font_01_sfnt_off00011994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AB 10236 bytes
SHA-256: 4795fada17f20d81e6f3a259a78c9a0fc386b03533596bccb7b00ee4d0d0aefa

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