Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca28f79b33bf4c12…

MALICIOUS

PDF

82.7 KB Created: 2021-07-01 16:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe78b1c35d88035a8a630479efe47780 SHA-1: 5e5d0304530994ad961350d9498e6e2914c2d484 SHA-256: ca28f79b33bf4c129cc059d071f461828ed156608a4977c101953299224c35b7
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

This PDF document exhibits characteristics of an advance-fee scam and MFA harvesting lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 http://yilip.net/userData/board/file/91459872987.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607488317cb20---69085641775.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3bf1c627---10666559349.pdf
    • http://offerseir.com/basefile/offerseircom/files/lawiludokumezijatasub.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/35g7ro0dbb725ecehc4uashfut/74544193116.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/xifufoz.pdf
    • http://brette-animation.com/userfiles/file/38968510579.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cd068769103---30774860160.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/nf97g6q9r8ma9ljb3i9m8somd1/76937634255.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/77051bc9a3dd883a76f67c769e7b0a3e/vepipetowab.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c70cd1a37df---67676341623.pdf
    • https://daaeportrett.no/upload/file/77800300034.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/f6b59c7526965314d312c1718c1969c1/40032735932.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/9602968977.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d4b92099e---pijabukinulidobup.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160858adf5c399---papagobimudewevozafe.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/3769382647.pdf
    • https://tyeetomsfishing.com/userfiles/file/kiwaxerugog.pdf
    • http://nitexprofi.cz/userfiles/file/48964052434.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ce3fbe4af---xogijurosinexidaf.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0eb265a23665a8c5f468c33cd5432728/seloretirolulubawuxuwu.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ql79bhmp3h52atn2khmrnl7da1/wugebatadegejixuwapukupoj.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbe3ddaf6a---pinozopotusowaxafodu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=fill+up+pds+form+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 16792 bytes
font_01_sfnt_off0000f9ee.bin
44d357dad4a0e4f41b9361fb3aa80b2b016d2fad58fdc00aa5950bebf571a585		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 16888 bytes
font_02_sfnt_off00012624.bin
72b4f8cbbbd3f45dc25a55ef23169ab6f7299851308c1ba1b57a081486e14707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12624 10476 bytes

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