Malicious PDF — malware analysis report

Static analysis result for SHA-256 49711ee7d4ff6075…

MALICIOUS

PDF

93.1 KB Created: 2021-09-06 20:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: da655ba08b7a8017bc543e2845fbea40 SHA-1: d58ebcd5d52b7d9d5405e863f1f84e720075120e SHA-256: 49711ee7d4ff6075aff84701cf957ec578b55b963a8dd0ca86f2b113255360ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=honeywell+thermostat+th6220wf2006+manual PDF link annotation
    • https://alshaabcoop.com/userfiles/file/rimogelule.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/20624228489.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/27320811421.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/404304d84108d257f7cd16ae2049b91d/74401511475.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/31903106918.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/vujapatonodidejavav.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/tadajime.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/fosavusugejobugoporo.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/84315739522.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afdcbfe260d---xilakilo.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/48798683337.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/xugidip.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/60710861578.pdfIn PDF document text
    • http://palami.by/images/file/solikifaniru.pdfIn PDF document text
    • http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/purafaxosa.pdfIn PDF document text
    • http://rafaelokazakov.com/file/13158224335.pdfIn PDF document text
    • http://foodchemsino.com/d/files/11432366547.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/zikiponisasudeworexala.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/4b727bee8f0f59bc39b0fc87e2435323/35532242528.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/021628557760.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/647771850c8f7093aad4b525d243951b/39182769782.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/12045377096.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/zoxidunogowezaku.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210620171809.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 11088 bytes
SHA-256: baea78a51ae3f1c2b9a9fa91ac4d18681d5155a68e44fe706b750a4008223b04
font_01_sfnt_off00011be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE1 19316 bytes
SHA-256: 678357250127bdbf0b8a8e946186a3f6735d078ced907a7d30a8669de52acc24
font_02_sfnt_off00014e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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