Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c073d17953cf5de…

MALICIOUS

PDF

89.3 KB Created: 2021-07-26 10:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9d0a97b9ff87dbcb69f109b51f227a1a SHA-1: dbdb8c38705d11e6c0a073c3db87dead5c11a05f SHA-256: 2c073d17953cf5de0c1a1b8790974ea707f0ab9df398b3ea86e4c453f661317f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple URLs, many of which are hosted on compromised CMS upload directories. 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 0.9990

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
  • 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://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609832dd9848f---tipevifubote.pdf In PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/jidizovalalomaxag.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/zitujipoxukotovedigubes.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/26770652269.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b76ec530e4a---87212438594.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/98429868036.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/dodutudurazexubetaritabe.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/sovufawojitat.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/e243d50e99ec569b563c873792b17c30/83374730319.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/45332908239.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/25470448280.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771331b6102---rapomafasopuzox.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/90246677444.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/225e00f81d5340788bd35c64ad5ed331/faluwakiruse.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/80641154946.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/repuz.pdfIn PDF document text
    • http://camera68gialai.com/uplaod/quangtri/files/dubogetefo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add02a17fa3---30290016046.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5f07f05f4f84cf9024024c5483d4379b/gagututobijetuleki.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/63728930389.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58923070958.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mebozogisovogodilibe.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/dazozibuwazofitemoroma.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/b3jndgulp18od19orvf194dcap/11033070022.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/dulazuminedimiridajurunek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=discurso+de+15+a%C3%B1os+para+mi+mejor+amigaPDF 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_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 18000 bytes
SHA-256: 468dafc9b5ef411fd2c335556184fbd40513c58f2d6498a536675af2728b89e5
font_01_sfnt_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 11232 bytes
SHA-256: 0159a02057f25c7807cec0a78fb8c616ed99182c95c99f70aa2920487209d3b5
font_02_sfnt_off00013ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1