Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5196b98178fd3e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-11 17:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 03f6e6c8be312e8cbec4e19a27c90c3b SHA-1: 3a3d45eaef233add701a95f85e4a723aa16d489c SHA-256: 1e5196b98178fd3eb263197dfb902444ceacdf1bd45ffb6034b04fd90f5ea2a7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://studiotecnicofrisoli.com/userfiles/files/muranukakom.pdf In PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377d4954bd9---91659761354.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pisolasomisovodefevugidud.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c0be3f87c---dorunodabosora.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/fuvuvutegekezu.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/86772573053.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/82589539595.pdfIn PDF document text
    • https://kaparatt.com/images/File/farobufu.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/gogifedexezadagipunebaras.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/34055875833.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109101843156861.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/lekapuxomafexe.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/lurelesovamakigilez.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/46791046305.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/85833525184.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vididegumapuxibowobalelum.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-8/20210908204518625052.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cd4dc9ca22f16d6390b2743a7a383499/suvewoku.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/guxukovobafuzojekotiwape.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/44311625288.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/24508074785.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f326abc458---ruruvozudib.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c91a25a1e---tudafovodenezi.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/23917411282.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=letter+from+birmingham+jail+annotated+ethos+pathos+logosPDF 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_off0000d653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD653 17796 bytes
SHA-256: f4262b75610aa1b4c8294711d7831fe6aca2aa77434d602172633bebd9fff6e9
font_01_sfnt_off000103c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDC 11172 bytes
SHA-256: e92187908d6be13df8ed7c863c583c25720e8f6b3631fe5eedcceddfe36497d8