Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10b4ffedf18cc42…

MALICIOUS

PDF

74.9 KB Created: 2021-09-24 23:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 432d0e0e61d5978af6af97a53a29529a SHA-1: 784fa321ef6e3dda3fa6295ae3dcc42aca5c9520 SHA-256: d10b4ffedf18cc428e4727b13a2e254da29f947127be38d6fc5fe5aa59a94f7c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URI links and the overall detection as a trojan indicate an attempt to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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://garglob.ru/uplcv?utm_term=test+raven+color+pdf PDF link annotation
    • http://dekoblickfang.de/userfiles/file/69734977057.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161459ba38f901---31625181132.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/11128651867.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/90750716894.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411f0c099fb---bagojikobidawudepokamope.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nisemalujuzikelaza.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/27211060305.pdfIn PDF document text
    • http://qdjshg.com/files/file/bolekabixogovekixoko.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/jurevujuvil.pdfIn PDF document text
    • http://gaudi.tw/upload/file/56467105432.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/sogituzo.pdfIn PDF document text
    • http://tayles.com/uploaded/26038969004.pdfIn PDF document text
    • http://vodnik48.ru/content/file/23811761979.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143385a519db---35436427442.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410e5c7a74e---nunanuvejewir.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/81173913036.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/442cnefh123e3b3uc9hodq86kb/wurifibebag.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec2820f568---37760892926.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/fikipitukunupezoj.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/wadukowuxutipegefolil.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/77660778998.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/85665313440.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/72418739575.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614d471c3bd73---duwulezod.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412655d4aaf---pibasugomolur.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/lozozugabuletodanoxirajid.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_off0000bcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC9 10552 bytes
SHA-256: d5a7cf3581af58e013a0ed26490bf946b6c6b859f13ff2aec27650beb52842c6
font_01_sfnt_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 18932 bytes
SHA-256: 2dc6b12ca2c9f98c2845df702324ebce0c52c6acd9c23d9511e1673baecd9056

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