Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b038870dca7637…

MALICIOUS

PDF

81.9 KB Created: 2021-09-11 23:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 282f3f24fa3530f9c32d562b756ea0be SHA-1: d7711d955a981351ef59ff782a311e35c6075aee SHA-256: 71b038870dca763718f95c53ff584caf91096c8f363acea41aec825516b81648
164 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern, likely aiming to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=crack+version+of+lightroom+for+android PDF link annotation
    • http://biomax.shop/filespath/files/20210907232225.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/18778342213.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/26217401250.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/5663397302.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/16873942872.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613adac887ba1---67384362769.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/vikejitonakuwakarapuf.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/51454166899.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/2782059649.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/50451597100.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/difapuwumunon.pdfIn PDF document text
    • https://petribax.com/userfiles/file/xawijujiguzino.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8f167358942b0f4d6e0ed54102e374ea/lenudegudugiwikuvofexe.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26fb5ea55---99639754516.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/zevubiwilifi.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/gewuwifovigajaj.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/tidapowijijaxelojuxa.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/31265468583.pdfIn PDF document text
    • http://ukrfirework.com/images/file/fuwujaxuvijipawidewoxo.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/mafawusopikitazowuzute.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613657199b8a7---76470077213.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/nixuvawagodobejujup.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 11112 bytes
SHA-256: da054f574dea010cfba18793d13089fd06cf875e8d88f48f7a77df2012d3681d
font_01_sfnt_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 18172 bytes
SHA-256: ca8f4fba145114187c6d005460a869a10bc6cc74064eb96b348b151749ae2ee2
font_02_sfnt_off00012261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.