Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa34705ee9e9c5e…

MALICIOUS

PDF

88.1 KB Created: 2021-08-13 00:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8f2e908b4009bb15bbd1fc731734e10c SHA-1: 63127b9bf6d4677ce418be220cad41138a94d234 SHA-256: dfa34705ee9e9c5ec00aa376b48e01e029f7683beed71ffd3164967b5b3e115c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised CMS uploads and disposable hosting domains, likely intended to trick users into downloading further malicious content. No scripts were extracted, but the presence of numerous external links suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dharmapremipariwar.org/userfiles/file/gavubigubilofujagosobirif.pdf In PDF document text
    • https://terminal.hr/userfiles/file/53800551354.pdfIn PDF document text
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/38128073336.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/203f73b9e1b1215e45d0486a8cb8ea3d/gipex.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/disotimonevenuxikegugavo.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/bif4nsqend7q4ac1rsbs8tlrat/wijovoveripizezovar.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/raxesamotuwogomizipuzuzi.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/80931509489.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/v46at1kb4fbg5ghdsgk37esrv3/70305993552.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc641e76315---loripulijogasiwirixuwupi.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/1316954637.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/61438937535.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/08c3114bac3107e7722bfe16a7694643/besad.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585c229b3f---wefawufolikebodovajodof.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/fcd7e9b993526eb33d8cb1d7b14b7c1a/wudoxepidepobomeju.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/65244020463.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///89429074603.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5b422a4924afa6d07ff7e13a83fd6e4/jozataxuze.pdfIn PDF document text
    • http://dytac.hk/userfiles/domapifazuvobed.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/4011682417.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/44516716411.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/47264349219.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0e195aa27abb249bbb4369cdb8313f84/38177122588.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/tavenezijaxijijefuzesov.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/749922ea45c82c334a24fd44b713dcbd/92309230085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=solidworks+2019+user+manual+pdfPDF 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_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 11376 bytes
SHA-256: 69725ceb266cb1788875a4b7cca63e9087613e5f36151af11b2a67a6c2f61016
font_01_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BE 17256 bytes
SHA-256: 69a4678f83586204e8fd664262a112c913763cb8881079e998e7680033a71f68