Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4d46a779601602…

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 15:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fc434dd859c532dcb836f44d536fa30a SHA-1: 6550e674d5fd015b8e2821fa27e7fa04bc12ccb5 SHA-256: dd4d46a77960160261bb892a07a57ba582a83e3282c66764136d7f68d2642800
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of these links suggests the primary function is to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://abofahed.com/userfiles/file/72059319484.pdf In PDF document text
    • https://angkorphotographyguide.com/userfiles/file/98697763370.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d228061b---mizizat.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/72311460074.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/12cc9de534f6d500e5e8361fadffb9f6/71287933983.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/ponim.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/70703702973.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210607160146.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/f74c1080c97f5904b0188ec78aa28753/42937720384.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/51089117572.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/tugopovetafubi.pdfIn PDF document text
    • https://zd-zeta.com/uploads//files/202108071546331121.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/podonagorusonozoxog.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/395c6a7cff7cba802db1c1a9c7b3be79/zovitikekibejivuvit.pdfIn PDF document text
    • http://napiarsaigh.com/images/wororogiz.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/31fb1ed793c9dfff5ed7772aa4654578/3005944787.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/26134302778.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e005b535d---76276116816.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/87937171095.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/5398578903.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e181152a---46605279158.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/tazinedokilowo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097140689669---datibilajeku.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/61181724764.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/86180521006.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/vcemejg8r2mrol3elcbr6kj2e6/kizukujelilixatamuzabalid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sigurd+lewerentz+pdfPDF 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_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 19496 bytes
SHA-256: 7d8d3dc313f6fc79ea9d15d084d73fa516b040cc8101cd6463f70726ad129b3a
font_02_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 10544 bytes
SHA-256: 074b20abf406cb523e41c98c986116d8fb801b4a2a20380f7c2e7e5ac35ab09e

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