Malicious PDF — malware analysis report

Static analysis result for SHA-256 719e0db083b873cc…

MALICIOUS

PDF

80.8 KB Created: 2021-09-23 07:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b2c69ae044995ac612994747bc1f6145 SHA-1: 8cb8767e11a9a8e52ab422a335316d37508dcf39 SHA-256: 719e0db083b873cceb30aeb0d29dd41bd021f15802fc1e8ea5d0c0196e04b024
134 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, with a critical detection score. Heuristics indicate it functions as a link farm, likely directing users to download a secondary payload. The presence of numerous unknown URLs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://binarbaidrealestate.com/public_html/userfiles/file/rukewabulimumefove.pdf In PDF document text
    • https://groupunsur4.com/contents/files/razifibi.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/wasufilejujemikaritet.pdfIn PDF document text
    • http://midospa.com/upload/files/11435228563.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f41c040b92---wulezofixoxuzifo.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/lixabipizu.pdfIn PDF document text
    • http://irinabailey.com/upload/files/20497274102.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/zajazemugodupa.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/66285801736.pdfIn PDF document text
    • http://kechengchem.com/upload/files/2750779378.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/netunoxaf.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/debozot.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614898b53a311---reratafanipoxovupisanomis.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/96577061620.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/43028100909.pdfIn PDF document text
    • http://baoveantam.info/upload/files/sovalijozopaxinosetub.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/30751026408.pdfIn PDF document text
    • https://keongracun.org/contents/files/38912249222.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/lusovinesojilobajidelaxat.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/zadufivugog.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/purozemame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=run+and+gun+unblockedPDF 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_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 17500 bytes
SHA-256: 1fecd62c17aa0717bbbf1418aa75a966f9802cb670509bad735911ab2c0ab030
font_01_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 10464 bytes
SHA-256: 84ab10c82c9a5ecbaaa720f147a45df2bb5525b2e9e5317e9a4baf92915811bc

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