Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6417181691c0310…

MALICIOUS

PDF

94.1 KB Created: 2021-06-28 18:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9d2ad9df5b4fc7d7dd68102696049aca SHA-1: 28f4f7db269cdc74a746516308de27927cd75c83 SHA-256: e6417181691c03107bd264ba753874b21aa671cbbe42736fe36b16aca34fb23a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous PDF files hosted on compromised or disposable domains, likely intended to deceive users into downloading further malicious content. The heuristic 'SE_URGENCY_LURE' suggests the document uses urgent language to prompt user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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.
  • 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://mega.kz/media/upload/files/jifowedaminezomodewagari.pdf In PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/1029357530.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/besepariwusunugi.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/gunagisisejazojepamunorud.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/88242009377.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/86ec66cfd7e25b04c215077fc04231de/xigamomigur.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/51683529384.pdfIn PDF document text
    • http://bakoca.hu/files/file/94428362352.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/eb199b6ffe8a1f39e8c83401a7967b5a/simewikasixi.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609055e32f972---83549855722.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/0f84f4f1324e03607ca872afc8da2672/mowovozowadiv.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/64098486682.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160738053bd3f6---liwad.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/65100263034.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acff8d63241---84248669760.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c86fcf19617---mixivozobopixupivanupo.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/15945669461.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef36c01a0b---20514460356.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/jimalelevapupexapuzu.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/v7hu2681tgvg7hc1kjbu8284od/sofotakokikig.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/mowik.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073e1d792491---7846899182.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/5ba0legbbufi7ip2ptlmt6a81n/jabotomipipedanuzas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=total+recall+full+movie+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C4 17832 bytes
SHA-256: 4700a71a7f65d8e3729f77e90e99bf32201b5c944152d7fa745918815d317786
font_01_sfnt_off00012395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12395 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0
font_02_sfnt_off00013b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B27 10352 bytes
SHA-256: daf68a2c2c5e1d44aa64bd0400414e875930623d134788cff9b60fb998b54815
font_03_sfnt_off00015296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1