Malicious PDF — malware analysis report

Static analysis result for SHA-256 644cd4e0581a96b8…

MALICIOUS

PDF

82.7 KB Created: 2021-03-09 00:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0257a479bda371e42b0ff384829604be SHA-1: 33776baf82db93526575090640c4e846a91aefae SHA-256: 644cd4e0581a96b834df3f67099deec06cc780fd63763399ca119a71cb5a7609
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document functions as a link farm, directing users to various suspicious and disposable domains that host further malicious PDF files. The presence of an invisible link to 'http://managerprogram.live/lovizutusumofapimoxexhxsq7.pdf' and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing and malware distribution campaign. The document's structure and numerous external links suggest an attempt to exploit users through deceptive content and potentially exploit-chaining.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://soxebez.ru/award?keyword=abstract+painting+concepts+and+techniques+pdf PDF link annotation
    • http://figuxovutofid.mygamesonline.org/sefunirubemigopas.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/peledubisesisemeba.pdfIn PDF document text
    • http://golosa-spasibo.ru/49375906939t6l2o.pdfIn PDF document text
    • http://sellforce.ru/fajewatiko739fs.pdfIn PDF document text
    • http://gatorama.site/red_storm_rising_board_game7stjx.pdfIn PDF document text
    • http://kulinar2020.site/poultry_business_plan_downloadsqc6t.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/10413789661.pdfIn PDF document text
    • http://interbank.link/is_call_me_by_your_name_a_book_series6obop.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/sebuv.pdfIn PDF document text
    • http://cardio-natural.info/audacity_software_tutorialqkgwz.pdfIn PDF document text
    • https://pimowaxe.weebly.com/uploads/1/3/5/3/135397576/gebaresubekuke_bisutosulav_tobidiwalelawo_tekigukizu.pdfIn PDF document text
    • http://blubadgehelp.net/ford_mustang_gt_2015_owners_manual3arwz.pdfIn PDF document text
    • http://kyponnik.online/xalidenogajowulevoremiwosuhrh1.pdfIn PDF document text
    • https://wavuzujez.weebly.com/uploads/1/3/1/4/131406867/5781806.pdfIn PDF document text
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/febowedi.pdfIn PDF document text
    • http://managerprogram.live/lovizutusumofapimoxexhxsq7.pdfIn PDF document text
    • http://gigewaxupupixe.22web.org/bufaxomagikorife.pdfIn PDF document text
    • http://casbah2point0.com/liledaxasufarutunafja1ul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_85bd7d6bb7f34aeab4b87d7b9ff4a1f8.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_ba61269c0c6b428581b40ead5cc2f925.pdf?index=trueIn PDF document text
    • http://xurosuforudev.atwebpages.com/48509243479.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_70f54cf0dfa94ee2a6c5fde9c8e17de2.pdf?index=trueIn PDF document text
    • http://nonilugubosaz.epizy.com/jisebizosexemo.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_8f78a4733a7443f5a543ce42c9dfb7dd.pdf?index=trueIn PDF document text
    • http://wemelimefudunej.epizy.com/ultimate_ninja_blazing_mod_apk_pearls.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_bcb34492759a45bfbac0f9fa05b15c84.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_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 5640 bytes
SHA-256: ea9631f958a12825384ff0ebceab3295adf6c01bf240df3e6de1d34679cebdee
font_01_sfnt_off00011861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 10612 bytes
SHA-256: c1e7809e7ab33815d43b7b0fa2129ca6a9f56a96f923d26574c7d41f1cfeb7e6