Malicious PDF — malware analysis report

Static analysis result for SHA-256 93be869c2ff2b6dd…

MALICIOUS

PDF

75.8 KB Created: 2021-06-28 03:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ec3ace3742ec06b9e74673e41ca6476 SHA-1: 45fa4f3a71012a000ac4df598b341c99521859eb SHA-256: 93be869c2ff2b6dd020c572388a94fe106335d165585168ae3e1ac013986c477
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised websites, suggesting it's used for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the overall structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 https://philabc.ru/uplcv?utm_term=kings+and+queen+cantina
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09bf47d079---18989454571.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609712c8bece0---kikowamezivifig.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d83f6b65465---25659412251.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84c9e1bfa---70523782289.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078370aacb64---vasetepiruwag.pdf
    • http://bafiti.com/sklep/userfiles/file/23863596449.pdf
    • https://rhodium.vn/uploads/news_file/39544126481.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/rs7h58911cr0q0k5ece06cqiiq/46504045769.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/xivuvifinepinon.pdf
    • http://baigeleather.com/userfiles/file/49140637781.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/h51p9rrh71f4m3nkr0n2qgfgrk/76586081338.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b35f687b8---devaxo.pdf
    • https://akproauto.com/nbloom/fckuploads/file/56951237458.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/43afe029ae3cbb5e6cbcc73f754bc552/damabozeno.pdf
    • https://asthasupermarket.com/userfiles/file/vurakenudu.pdf
    • http://luingpyrex.cz/foto/Image/file/momaxefolijeb.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/c6e7ac0aed62bb1bf5b6f014d30806d3/59486173769.pdf
    • https://ivanamihic.com//files/nomoxer.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/aee64aa86bb9f0e637814cc46d6443c8/wutumafabexizoz.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/v9pqj159u6he0m1hmer8snth5e/95789958992.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075c76f5c5d7---10268144800.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa7a909f83---9001073031.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ufetk5rkdb69rd82dsavovva7t/95001372232.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1688ab5982913a0fe3d0edd9ad5191e7/66218075138.pdf
    • https://namlongadc.vn/uploads/news/files/45277553071.pdf
    • http://chetaomaynganhnhua.com/uploads/files/getuvilujugajokiropa.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/2dbe829bfb4b81ea289da595df7b4758/22950997846.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c46a.bin
fbd2d4fcbb590664f3b3f8c86ade1fb207b249f918b94404a24e0e63150545b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC46A 10516 bytes
font_01_sfnt_off0000dbf2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 16792 bytes
font_02_sfnt_off0000f404.bin
6cd9f3e2c424b2164390e14752e7d14164c87c35ad8d09c429c5e080f52de727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 17572 bytes

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