Malicious PDF — malware analysis report

Static analysis result for SHA-256 447772f0d4a76b48…

MALICIOUS

PDF

74.7 KB Created: 2021-03-15 11:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 702aff2260ff5aaa0ebe370682fd4619 SHA-1: 5b8d32c5a8b97f6726eb44d63ae4e934177c044f SHA-256: 447772f0d4a76b48619f3020fd40a87d140498bc02e0c4c0483b388ba110ae9f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a downloader or phishing lure, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=chopsticks+netflix+in+480p PDF link annotation
    • https://cdn.sqhk.co/wibezudak/j1t1hoH/98850156340.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/iSijgio/livexe.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/xibidow_zarimemowofez.pdfIn PDF document text
    • https://xabejelowubi.weebly.com/uploads/1/3/2/6/132695530/vubeziz-ximuzelilori-fidodutebi-zujagogaki.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/yiiKjaI/black_christmas_tree_ornaments_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/gggc0ap/941076840.pdfIn PDF document text
    • https://fasexonepagi.weebly.com/uploads/1/3/0/9/130969542/kanafiviso.pdfIn PDF document text
    • https://cdn.sqhk.co/gozigawefo/hejibWo/vivo_video_editor_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/IgebggK/flights_to_new_york_from_detroit.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/jSUYLI5/camera_lucida_app.pdfIn PDF document text
    • https://xoluvujotu.weebly.com/uploads/1/3/1/0/131070376/365cae0bf.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/g4Qhfqn/fireman_hat_template_free.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/welcome_to_the_monkey_house_where_i_live_summary.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/dowuvadigano.pdfIn PDF document text
    • https://fenorave.weebly.com/uploads/1/3/4/6/134639489/gegek.pdfIn PDF document text
    • https://jalebipozufi.weebly.com/uploads/1/3/5/3/135320073/garede_pixepusakemoput_xavav.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/makalah_anemia_megaloblastik.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/eab37a98c2a8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womidelere.myartsonline.com/55373377170.pdfIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_98b91ffb436f4ba89a977bfc2b6a522b.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_a25e0c93be2541c5bbad29b2f6668e86.pdf?index=trueIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/433055925.pdfIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_90f0be69e221437eb1557b464a0239cd.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_2c97322b4c0e4516bce16df75fb23ca6.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 5260 bytes
SHA-256: 71698ed0e007b3dc41c17179cc201fc74447792dd206b9381b3c22390efa7ca1
font_01_sfnt_off0000f86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86C 10832 bytes
SHA-256: 2f200a4dd87e82da43fce8f87cc7bf64dc4042197e4f29248cb4682fbdc6076a