Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f17feb811090ceb…

MALICIOUS

PDF

89.1 KB Created: 2021-08-05 22:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c81d4c25dcbda9bc75fe40c58f0fc5b4 SHA-1: 00ed9463e5ca55525f725b918abfe2e6a15af04b SHA-256: 1f17feb811090ceb0a43a943b21a49517fc96f770610f7d68d285aaf5eff97fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • 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://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/feac1130b1f87cbe61d9da4d453ec537/nenunofazipizopadi.pdf In PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160759d1669121---28634244225.pdfIn PDF document text
    • https://yasacompany.com/upload/files/zevegotokavi.pdfIn PDF document text
    • http://sciattella.net/images/file/duzerasivisa.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/42042853569.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/wudezepunimupogad.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b08fe6c6b22---wiwaxujakazajofovegotu.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609071b7f40a5---wufagifalubut.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160df401d3ef4d---49456732585.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/dewuwuzomepevatefogakesop.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f826af4f---lofisiwapizunixus.pdfIn PDF document text
    • https://eternalbliss.net/file/71978618218.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/65076425154.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/jotesepapese.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/a305a4e0a0a560d52805b3a7d686aeae/8883799316.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7d230c38---67144957151.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a61d264a5---89499833639.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c76e79be---wegomawuf.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/68956734476.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/funub.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/2202871113.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/ledokiragorazuf.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/gederapuwazazaloma.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/lujuvawidena.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5u5o4eqdp0jnslo4pprdpid7iq/97657140639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+adewale+ayuba+song+ijo+fujiPDF 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_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 17624 bytes
SHA-256: 57a03274f86ce9a00d27c39723ac9b0d9e0f8b7679c5920c9efe707871ef3e83
font_01_sfnt_off000123d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D3 10904 bytes
SHA-256: cf71363778d0ad651a4f2277d111fcd749109ecee17b085cf1b0a17ac608f37f
font_02_sfnt_off00013cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1