Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac1e29f88c29300…

MALICIOUS

PDF

75.9 KB Created: 2021-09-22 09:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f75b7c7f040f3a391a3966193dc2117a SHA-1: 54d34f0858c13bf8a5160873b5c60577155823d6 SHA-256: 1ac1e29f88c29300cca52039be9a7f43d189cc98e40b1dc938d81713f237e7c2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file 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 point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=picsart+full+free PDF link annotation
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161466dc9e8e18---88623723184.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/43226974673.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/vesovepowo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/1a9d8a7619c1a350fb325a5308babb37/45688896093.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/golefow.pdfIn PDF document text
    • http://bdsductri.com/upload/files/sukeg.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/7855099404.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/duxuzovojomu.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/roruzebo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ics490gag495s54vv9mjlugsi9/27607491641.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613289f16ba69---buzofiwunedazalowesib.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2041d3e43---nolirirolowefutinozu.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137479c258d8---zikenesaduxazek.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/34782315360.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/pinupulobavemovoji.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/28061338802.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eae46d2d1331d96a3f30c8bc1f71a3dd/woxinukegos.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/3100089200.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/migususi.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/74781029409.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/fowabaw.pdfIn PDF document text
    • http://elskenecologie.nl/files/36657840395.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/kevavogekeligages.pdfIn PDF document text
    • http://uhorder.com/upload/files/tosexufidewavuxileloz.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-18/3cbc2f7b37285e1b79246a305eb80b10.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_off0000ca05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA05 10204 bytes
SHA-256: d1a67e66c22e129d70c19940067d481eb671a0b2afc4df8f36e3e20f3acae927
font_01_sfnt_off0000e10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10D 16052 bytes
SHA-256: c02318e5dbca404b919e65c994aefb3bc5544aeed4f5740783ace693b27f3342
font_02_sfnt_off00010a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1