Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cc0fba51d7a8a4…

MALICIOUS

PDF

91.6 KB Created: 2021-09-05 17:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c24312f261e4dc653ba4cfa245590b5 SHA-1: 03596b17c968f299e3afe1cb602d2257c21c0689 SHA-256: c2cc0fba51d7a8a412b2371869dacb6e56106bd3430d142c2b74f8930aef60b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, potentially leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • 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.
  • 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://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd9b0ea18a---tujuwuduvakad.pdf In PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609fca10a6e7b---40452660321.pdfIn PDF document text
    • http://wami.cc/data/files/rirekivunezoj.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/766b82efbb69e45b745ddf29cdc42546/23930081781.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/8740038246.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084312d544c4---52082233735.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/menoxakavaputejijufuwow.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/24585028114.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/72729030312.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/norineju.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/towafoguwupunu.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/45305731436.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/94346767929.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/c0591ndtrcg0ge9coe3b73f2c0/65002402793.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/pikuvesigabut.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb0607b11---17003198382.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/33037491695.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/moteragijilabakugawom.pdfIn PDF document text
    • http://tano-cable.com/d/files/98820132912.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/81962176382.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/wadabik.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda9bbeb3cf---zotebufanezikarufo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086205c4e594---3782413837.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/peginufomeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hughes+and+kettner+statesman+dual+el84+manualPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_01_sfnt_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 10952 bytes
SHA-256: 57928a751499eee5a4860012b67e538072f0cf4cf0b95823dfbd6e1d5974b442
font_02_sfnt_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 22540 bytes
SHA-256: 1a8a27a6f682855f80e0d5456afa9bb0bbc7f7623ac1feda489dcdd3a36bdba2
font_03_sfnt_off00013d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D32 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_04_sfnt_off0001452e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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