Malicious PDF — malware analysis report

Static analysis result for SHA-256 2050c522090f5a27…

MALICIOUS

PDF

87.1 KB Created: 2021-07-01 09:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2fd2260de002f52576e1f5c3078f2c5f SHA-1: 43af5f6209b860144a0c329747cb53e4d34ba9c8 SHA-256: 2050c522090f5a27dcc23f4f67c785d8d498b4a4a10397836daf7ada63c5f5c9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=simple+marketing+proposal+template PDF link annotation
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/480b512957d6da24ef460999fb4f74dc/nonasewidilewemebopijuj.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a191ec686c2---lagimoxokirudajasapi.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/gqtrnsct7a2fr8a6eehv9o71je/paxefagox.pdfIn PDF document text
    • http://jarosi.hu/files/file/17131551498.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9823e04be---74898395517.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2r9064r5j37fectf9kif2gg8gr/47305369893.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdf5c7e4eb---pasovegetex.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c7f597b7---19028182520.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/68873492397.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/falagirapoj.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a53236572b---witibalorup.pdfIn PDF document text
    • http://leesfeest.nl/leesfeest/sites/default/files/file/xipimo.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/ronelebumizijizofuzepa.pdfPDF link annotation
    • https://alternativecarrepair.com/userfiles/file/rotosogakexix.pdfIn PDF document text
    • https://datajournonepal.org/files/wuxewezos.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/ae283b7db58c28ff31ecec8b71dbab64/gutufopaduwajurolajanotir.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/adab1740032ec2c7e652a12d02d4922d/1673547501.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/a2048c4e1072c0123da16dbf076ad96b/88344223120.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1bb3d65a12d2badb65dbcc8d4439f2d9/96195812933.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f5d785e8b---53406971379.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac909280416---zubedibuvubopuranumazuto.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/bapidof.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607284513520b---fipoxazuzimavujajeko.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 17160 bytes
SHA-256: 7c3da945242a261cb03110134b9961e7df6eef8f944b27b299715846459e42ad
font_02_sfnt_off00013661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13661 10764 bytes
SHA-256: 5fefa6591312cc96ff1f8ec013accb352dd73b23d6255ae9558a64039a93b490

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