Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34152693319fd46…

MALICIOUS

PDF

93.0 KB Created: 2021-09-13 23:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1e0ad4224cbd2308e1f83d49acba6819 SHA-1: 1b0e1bbd9d38aeb06509835cdf83a57b84513116 SHA-256: f34152693319fd46ccd3c6583ef0dfceac47ce9f2f798bedddcb6c37a7801a5e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by a ML classifier and ClamAV, and exhibits characteristics of a link farm. The presence of multiple URLs, some hosted on compromised CMS uploads, suggests an attempt to redirect users to malicious content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://sgicorp.com/userfiles/files/57696387354.pdf In PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed83415b5b---gixovekamanixakonosaxira.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/wijida.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df7a2130cc---wukejofamuvuzejetoguzaba.pdfIn PDF document text
    • http://jucal.es/images/file/39391368902.pdfIn PDF document text
    • http://htwy.com/upload/file/74739693960.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/35245543548.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/pezagoxe.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/mixubitibelijixoxotopez.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ebaf7b3429c86ce1b348c66b0931ddfb/38160774479.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/28249588198.pdfIn PDF document text
    • http://elma1.ru/!upload/files/zovexiwirotovizo.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/77991165854.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/dukedajizegojefozotu.pdfIn PDF document text
    • https://timminsrenovations.ca/file/vW78r5BYPGDkZX47.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/sexodebovuvilaxu.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/kumiditazivaneteren.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/52617059292.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/wedusuvitunezefujaludoz.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/vemikikasi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7dfbb672d---20924821754.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/52670991237.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/78807435604.pdfIn PDF document text
    • http://elitacasa.it/images/file/pukavifot.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/95102547603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+greatest+miracle+in+the+world+pdfPDF link annotation
    • 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_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 19284 bytes
SHA-256: f0ddcbf5d89d0e26d777783d57e6f5196cf4b24cce233790edbaed7aef813cfa
font_01_sfnt_off000134b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCE 11116 bytes
SHA-256: 91c365ecdb2330931d2cbb7370efe8822d10f29f9d3a0b647732757d4798616e