Malicious PDF — malware analysis report

Static analysis result for SHA-256 7065ed11ab463a66…

MALICIOUS

PDF

88.0 KB Created: 2021-09-05 18:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 811d7ce0e4bcc205aadb18dbedfbf637 SHA-1: fa4cdba7a6a87e33b5c8b585d9994023b6d32008 SHA-256: 7065ed11ab463a665542e4efe8795031660b6c276de6d833b223d28270c82f35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the presence of numerous embedded URLs and the heuristic findings suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://takipbizde.com/calisma2/files/uploads/88746289872.pdf In PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/lexedakotagemenisopi.pdfIn PDF document text
    • https://lordoptika.hu/files/files/50733022858.pdfIn PDF document text
    • http://zerosquareonline.com/file/mumolapo.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/fd596d1dad7c6b378770c172fb704307/vegemisiduzodikisezabu.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b2628a047922f805195d027e6ec5a9b9/61942410250.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/29354260629.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d4f6433bfc2ba6be8674e03cbf498889/81758099107.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/maxiwidorepepirime.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f8b9b3b24555d92d260e58a971d36665/jixekuvutijakufol.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/63331435946.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/dunedexonazobidofatibasa.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/70985997192.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/3671062081.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/3ea6eba53308a709c64e35aafead92e1/pefimubekuvugikeguge.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/lesesove.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/95987909850.pdfIn PDF document text
    • http://labonscafe.com/userfiles/2903123137.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9583a994f582280c77ac2afe6da1ff2e/19252728059.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607095dab7023---gijavimedaju.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/gipipafajivanit.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/96685103233.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/90412138633.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a802d41280a---tenuranuxezizebemalij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=wrap+recipes+pdf+downloadPDF 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_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 10596 bytes
SHA-256: 8a0b89c678e00690633b6f51ca72ab80d4e0ae3c5616f857b4cc55911087284f
font_01_sfnt_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 18400 bytes
SHA-256: 9c9b8ca7671dcc7cdb345a19d8e06366bbc75dfed1b67bca2bfb410c9ac37ca1
font_02_sfnt_off00013aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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