Malicious PDF — malware analysis report

Static analysis result for SHA-256 196e3563a660fcec…

MALICIOUS

PDF

96.8 KB Created: 2021-07-06 18:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5355e7630a44ad5011027bc7359920dc SHA-1: dfb64228b08a3330814c5fdc41ee4802e9a1ffdc SHA-256: 196e3563a660fcec1f596106a1c0f4b083c21df7fe34ebe0c13008736d3d971b
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous compromised WordPress upload locations and disposable hosting sites. The primary goal appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://deborahkay.com/ckfinder/userfiles/files/vanarowefenimubotad.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e9f8a9e81---gaxotezimopefebipamomuvot.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee7ab49a23---14058256507.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf08d7ec3---84066540359.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab7bb461f---pojur.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a8ef45743---88685225351.pdf
    • https://capecoralliving.com/media/file/23100957895.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d4c9977731d420616a09b0a2480b3a7f/lagalepajusilepazikosa.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/vba4pidql8vv0iirb7ugque57c/55870197418.pdf
    • https://emauto.lv/index/images/up/file/39203250815.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/118d50fa9f54deeabdb7b19dad9c33f0/xoligel.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5e54483f9---dimoxovavamowiko.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/f04fe9c795c459e264ae1de06ccb488d/faxufetinutexog.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40d3b6e86---30926652899.pdf
    • http://dioceseofniranam.org/userfiles/file/43319390509.pdf
    • http://naturalmis.com/userfiles/file/zugogawa.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/olqh3lba5n0jbfsvfmurjr2dqs/joredeb.pdf
    • http://ballstonfamilymedicine.com/clients/861402/File/71643355415.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/kimutagamazasilego.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef86bcca48---koxiwigogozumomi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=express+your+answer+using+two+significant+figures
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011408.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11408 16792 bytes
font_01_sfnt_off00012c1f.bin
f6416f51b7a2c79546282ce8523edc0e760f76d2a67c4885ea7e04a65097d01c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1F 10992 bytes
font_02_sfnt_off000145f1.bin
5ea0196ce4ddd445c1034ce081aeefb4953c4dac485a0d82d29def4f54272ec2
pdf-font-stream PDF embedded font (sfnt) at offset 0x145F1 18152 bytes