Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0914d1c5e7ce7c6…

MALICIOUS

PDF

79.5 KB Created: 2021-09-14 01:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae7ad2632437b461c622f18df7aec185 SHA-1: 5a0b5b4623890163b7fff0401b7fb58eeabcce2d SHA-256: c0914d1c5e7ce7c648717d41c52653fec1b81ea0338ccd0e651491ce39772203
184 Risk Score

Malware Insights

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

The PDF contains multiple external links, including one pointing to a raw IP address and others hosted on compromised CMS upload directories. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading further malware. No scripts were extracted, but the overall structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://geriatriccarenewjersey.com/userfiles/files/mopazewiv.pdf In PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/14971594628.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/4857538343.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/67237113629.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9fd7cc2f9---defezunugibasodenur.pdfIn PDF document text
    • https://led7.ru/file/funexotesajanaj.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/tugedafovapogovutodarupi.pdfPDF link annotation
    • https://indiansabroad.uk/userfiles/file/ruwopezekukir.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/vpm30uanj5omkigg52i4ffokg2/26784859800.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/69111526990.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/mujajenutewowujirafozetu.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/pisikiwasepov.pdfIn PDF document text
    • https://cargotavio.ru/files/file/zepibekojegu.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/87729702715.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/zowironivovav.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613422769e936---nawexu.pdfIn PDF document text
    • https://trystsalonri.com/images/file/mofesutufe.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/vixurixejituwez.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613daff11f6f1---rusarojesedo.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210907164838.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/wudunezokavipawivanizedet.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/1554985356.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0ujfhtc07pl0krthl4tahlv3e8/lajidixipipawesimifade.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/349366456bde778eb8e9e859621e68c9/39998336015.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/tusuzosariwekotor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+apa+happymodPDF 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_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 17968 bytes
SHA-256: adcc15600fd5efc1ec270bba1ecffcdd57178c63304c23838aa2e961bbf0c07f
font_01_sfnt_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 10268 bytes
SHA-256: a2217392fe55c859ca5c1596e6658dbe9e0d5a981e16cb0fcbbf434a4c07403b
font_02_sfnt_off00011850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1