Malicious PDF — malware analysis report

Static analysis result for SHA-256 132d13e54f9dc9f2…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 17:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 86fcdf54ec93e93b38501fcf18877577 SHA-1: e7e42b11ab4f64c73dbc359be0470b6082e7fb49 SHA-256: 132d13e54f9dc9f2243846d2bb1751d29af9b534a9ba3beafeeecae7866f7a42
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are hosted on disposable or compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://dopuskvsro.ru/UserFiles/febugowadifegizoribeka.pdf In PDF document text
    • http://aranykoronakft.hu/userfiles/file/jafokolaleximu.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ad43ccdff7cac965b6a17253e0a36389/46362613514.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/rokisegolifixasuduzifi.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/2586998839.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2da8d0329fd30b2719d72cac2ce5e756/dewinunozazixati.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f8306793b---guvevoxegawoli.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/nalipoz.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/31098190197.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/43036594132.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/90731435834.pdfIn PDF document text
    • http://hk-keber.de/images/file/vedenivixizaviwobinak.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/depewogifedorepazotutus.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/madidixebiselabus.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/75156501301.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/46392736750.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/31839481682.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0816b17151692fbe84dcc3dc9b95d4c3/vevapunapesikinelixodonak.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/0f8io2ghgndnlg1d2fsjgmn0j2/mepalowexoweseb.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/70584593322.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/14741581139.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160becd7e7f9c2---41353488190.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/46atph5mkaa7ljbq5qsb45opl2/70008084690.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bss+blu+100+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_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 10152 bytes
SHA-256: c2120ecb8449e32d48033324d1a8a5a0414a00cccdf51a073cc5856411182d7f
font_01_sfnt_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 17528 bytes
SHA-256: f1e7de7bf875f5779892bac87901f29fc8d2ad82dc480ec027c9f5d36a2cb4c9
font_02_sfnt_off00011a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1