Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e7741dfc3341cc…

MALICIOUS

PDF

85.1 KB Created: 2021-09-08 19:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 88ecde8786b6ca59ef33431d3a947105 SHA-1: fead696d83836fa0d8a68334c7b43b231af5cde0 SHA-256: 83e7741dfc3341ccd5318ca59497bc7ec85872da74e0fd44938b183b5fb51e98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure align with common phishing lures, likely intended to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=my+life+in+crime+pdf+by+john+kiriamiti PDF link annotation
    • http://yds-wcv.jp/free_images/files/vamenonepazale.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/52625786814.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/vipududozib.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/52619408352.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/19086986536.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/97437384749.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/b021bc25a47497bc68889ca1c33c52a5/wimemunowejanizifoxik.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/11166647974.pdfIn PDF document text
    • http://levotst.com/uploads/files/70185757218.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/45869532040.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/gevoreju.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/35858974123.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/vemago.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/uis9ijmb6thch6v6rrq3qapm8r/tosejawojo.pdfIn PDF document text
    • http://eko-uklid.com/files/file/fiwaxajexunuleva.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133b313db638---77862765175.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/92916172293.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/nizavotezesanawogowew.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79133718302.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109041634397731.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/padikoninu.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/7096882720.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/tumuwuri.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/86713398526.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/mubupadirepazugu.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_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 11184 bytes
SHA-256: 75d2757d8677a63c24a466f75469a5ba67d47c6baf039d49cc8002900c9436d6
font_02_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 18488 bytes
SHA-256: 8eabd6b3a6ff7a548462939975050c6fc11e1d6480a64dafba54a0e7db245f34

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