Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5d9de06f2fa6e3…

MALICIOUS

PDF

96.7 KB Created: 2021-09-09 11:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b7d34640abf925c0b0e8eee00eff199 SHA-1: c2da10fac333cec0fae6418cd10181a6ba5f2ed5 SHA-256: ae5d9de06f2fa6e39285d943a02a5bcf778bbd15beb18501cb0c2106be3e7e11
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS points to T1059.007, and the overall nature of the file suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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://drafthe.ru/uplcv?utm_term=new+mario+bros+rom+hack PDF link annotation
    • https://gplacestracker.com/userfiles/file/niviwixi.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/34018133939.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/91139931467.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/10134949026.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/jelag.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/e8cb7287917866658b9e8ecae058a48e/18550651112.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/15044834915.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/50364786849.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/35293316302.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/76383682492.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/rozenap.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/tabidutokabumopev.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/sanepikovowuga.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/72923252094.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/34012322756.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/17370425514.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210902_071214.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/49709881237.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/8740232555.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/96505191376.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/nuzuwudanuwezu.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/26368358294.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/8931317518.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/supemodilifip.pdfIn PDF document text
    • https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/popenofemodazelodalagar.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/66420297857.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_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 22052 bytes
SHA-256: 39fdfd03c1a3ff37f4c8e8e7ab2d5e36659db7f18224142ed865f86a8edb673b
font_01_sfnt_off0001455f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D76 10540 bytes
SHA-256: 388f50359f45b9d15b0d6d640ff88d5bfc37f8b997077e2e7487303105d0c441