Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66cf7e1ec84d72d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-13 19:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8ae037b71ec6dac6e5216f2fbb1a17d3 SHA-1: 08ea0e983ce8e2a6d566724a211c634396f587c2 SHA-256: e66cf7e1ec84d72d50acb0796c6447316366f242a5c30932fed2415cd6b58488
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malware. The presence of external URIs and link farms suggests an attempt to distribute malicious content via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/3ab4cb3f5d8331a004ffdf5ec80d4278/60052345547.pdf In PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/78893695258.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/juforure.pdfIn PDF document text
    • http://oris-am.com/editor_up/35588523804.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/35078577518.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/4mcotclrsf6gqnkp1ia169oqd5/85219360618.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16133bf90c1242---sikexuvaxafomulobavaniwum.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c6d9a2a585461d8b100467bd60c08799/pusadubulagonut.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350e2ea3410---36942954071.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/kawexubu.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/nonutuvapivenezowip.pdfIn PDF document text
    • https://portofcrotone.com/dati/upload/file/pivalaxuwefude.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/rixixonakupulodogovozidu.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/98911864105.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/47701406246.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/piwelaruzenajilidigok.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/4bavbkds3idv189dt2rkbi5fl1/koparakepodulilozepov.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/vemirutuzevirajab.pdfIn PDF document text
    • http://xfswchem.com/upload/files/titijizajixiduwu.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/pusogeduni.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/wifit.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/67712997450.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/dofijag.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/40027112743.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/tavagaxuvusejugomaxewagek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=flame+tv+apkPDF 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_off0000d6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B5 17796 bytes
SHA-256: 7721a4dab9fea954a9777b1c6d7459479edb23ce70203da8704c387909f743b4
font_01_sfnt_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 9964 bytes
SHA-256: c9a8a7a1f6e6dda7cb2af112a85e3dbdea927c9c4a7c15b035640c2f83b7d46b
font_02_sfnt_off00011b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1