Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecd3b21ca1b42a2…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 16:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 067bcebc9bf08da7ab0da494c51bcdd3 SHA-1: 8c053dfe2eeb38ffc5faf089f7cece7d464af213 SHA-256: fecd3b21ca1b42a2356b2f32adf5ede646349a274f609b5121c901ab3b439e9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous external URIs and a link farm hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pixomot.ru/uplcv?utm_term=plants+vs+zombies+hacked+apk PDF link annotation
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388d4f67e15---34273820703.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/fijujeput.pdfIn PDF document text
    • http://wsm.hk/images/files/zalovezufivodudozipozu.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/aadd280a7420ea2e1259a67bb8faf5b0/67897614429.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/xesorafeluvinugemedi.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c5a7a53f158fd0246bc2c36962a179eb/teterufubot.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142b5d0e03a1---sofirovawururusedonivoso.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b79a35fbea4f455b0a125006e8f578d3/tamawabin.pdfIn PDF document text
    • http://halanmilk.com/upload/files/riwepanawo.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/bixawukivazexokeboz.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/jivelogajopidatufatele.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/76ju66be9akr5skaugdtef3nsi/gaxoj.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/86877134630.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/likuletubiruwavo.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/5328219593.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/redofebe.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/74151529510.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/92860497699.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/12407503004.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/51797892644.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/97293530784.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/542530381.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/luduvemu.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_off0000ce3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 11040 bytes
SHA-256: ba76e16c1e7bc6472dec1d317f17629e8afad8c137991843d3d81beb174e1a01
font_02_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 20500 bytes
SHA-256: 3d4a0b91a3006a3efdff894094cb1618838534c86b308fbaec654d96ad396875

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