Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eaaa4f872a5bbb3…

MALICIOUS

PDF

96.9 KB Created: 2021-09-14 08:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac2ed87957fab39bff8ca3e9c441e779 SHA-1: 926b719e4e0b79667c20aeeff7ea0aa6b76af53d SHA-256: 1eaaa4f872a5bbb35f573d67b3399519df065de54384e63446fe14dbc70b3a26
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 6

  • 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.
  • 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 http://bioident.pl/photos_fck/file/mitazevidagilibewikuvara.pdf In PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/78526691519.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/87467000671.pdfIn PDF document text
    • http://fructusartis.com/i/File/wapavibizavuzisugonilegix.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/modobig.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/gokameroveraxeted.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/kadafazozaritedowu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/c8808e145ee1c84cf098377c6b9202c0/tamiwifilelafode.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/visinemedelur.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/52280433253.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/93490935982.pdfIn PDF document text
    • https://subarini.ro/mm/file/mewudesames.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134ea5ecd8a4---60826076432.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/26195205639.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67523a4e5---58808591956.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/buvotinu.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/bonufezeretamudex.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/ruriromuvapamilew.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/soxuse.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f518958f33---13567301030.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/fudit.pdfIn PDF document text
    • https://badoza.net/userfiles/file/97825870661.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613534603423a---8738847463.pdfIn PDF document text
    • http://talleresjpg.es/img/file/61794656192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=adobe+lightroom+presets+mod+apkPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 10948 bytes
SHA-256: 667b8aea57ec7b6487baafdc19303900dd5e7d1b9dffa729092437d761608acc
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 1828 bytes
SHA-256: c65da4501f80be219574418733c77cb401adeeba023536fee640a710fe7be6ed
font_02_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 16584 bytes
SHA-256: 46d1642413d6357aaa63d23a847362699b64423858501a0b767597ffeabddc13
font_03_sfnt_off0001218b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218B 22948 bytes
SHA-256: 2682c1c60c97cec105560d0c6c5de6524d43f45ab98f2f12d484a5bf9e2964a0
font_04_sfnt_off00015cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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