Malicious PDF — malware analysis report

Static analysis result for SHA-256 13795a3100f0cfc9…

MALICIOUS

PDF

85.1 KB Created: 2021-08-22 03:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 982f7c151d7fcbc386112193d1aa5ffe SHA-1: 047c227c5a8d98f4d3df7bd7e6a032f5be23bc21 SHA-256: 13795a3100f0cfc9603d828d4fdda19f36ac73d71002823e5a8c168a09bf546f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The document body is unreadable, but the presence of many external links suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://munis-roquesalbes.cat/demo/vilalba/imatges/file/xulasasonepisovupezi.pdf In PDF document text
    • https://okinawa4d.com/contents//files/naziribuma.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/56292479741.pdfIn PDF document text
    • https://signika.pl/Upload/file/nafiregowowupakawetonif.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/e9eb22c39fa922d39d270e456a349819/vomotasoribe.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/lovofutofezasen.pdfIn PDF document text
    • https://angkalaris.com/contents//files/64875227092.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/71419649196.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/33928586016.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/40900959978.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160781d21171fb---4660747033.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd31623e83---zilagadunowukenofujiwi.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/33826588048.pdfIn PDF document text
    • http://christopherdallo.com/file/37093736718.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fff6fc6dc8d---39953024090.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad43c2c70c---36882930198.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/65553886725.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a306015abb7---xajitanomorefolenajo.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/iab2pckshju7fnh1v7vkglorgr/56306767853.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/jolosepejonirok.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb2f3d6f40---12997581805.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/xaxunukirurojupig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=do+soulmates+have+the+same+eyesPDF 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_off0000e958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 17376 bytes
SHA-256: 2c36e4ebfa3b6e7281a9d7fda674d393ff4bdd68ffb720b898d11f198c338aed
font_02_sfnt_off00012eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB1 10360 bytes
SHA-256: 22124984ce7b3e996363d3341abf07ee8d669188b65e7d4f31c2691aeb627ad2

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