Malicious PDF — malware analysis report

Static analysis result for SHA-256 116fbf010067b66c…

MALICIOUS

PDF

80.4 KB Created: 2021-09-02 12:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 47e84d35613174e7c6a2b7d2da8d6437 SHA-1: 0b27d7be691b775487d7696299fe9e832b90dc19 SHA-256: 116fbf010067b66ca8c87f2b9a94debec224704dd64f09fcf6ca1d319bf36bbb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=extra%C3%B1os+peregrinos+12+cuentos+gabriel+garcia+marquez+pdf PDF link annotation
    • https://sharadsangam.org/UserFilesTwo/file/2264525284.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/34034804441.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/lozap.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/feb36dd2b85c1d6e02237198a9662935/38087025253.pdfIn PDF document text
    • http://freetds.net/userfiles/file/35560879886.pdfIn PDF document text
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/tupojapegebevola.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/49648775490.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/26l0kij76m8iipd5jqm8rur1s2/26581410819.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160940c44ee2d3---68904036475.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/kedepedu.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/1286578431.pdfIn PDF document text
    • http://hasyo.net/files/file/rojike.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/73a2715e1c0d1aa12fc45a8d4a77a03a/salozufuzubu.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/43837609358.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/86616270383.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/2cd2b6b1091f12eaf132724ecbdf3667/dapafuretekujib.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/xujezegu.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/mavefanito.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/73611471182.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/52ca781c516ac5044a6094933a67c29d/vasudifejamojukixar.pdfIn PDF document text
    • http://heureka-cz.eu/files/69922302508.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_off0000c863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 20568 bytes
SHA-256: d7c57caace0b098b77155ca3cac927a609f75779aebaecbcd2cdd992f8d36b09
font_01_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B5 11872 bytes
SHA-256: d25c2a113c633ab0415effa1455b5b2faf5ef094209526d8a145f3d640bf8df9