Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89ca02220392139…

MALICIOUS

PDF

85.1 KB Created: 2021-07-06 01:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f94a72a2e010509878fd41c48a82c007 SHA-1: 61ce84307c154cf8a0091ef9622f6d2c80a133a1 SHA-256: a89ca022203921395f0f9ed47a153e91cc4658585c1028c57bee74fff86fbc0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://aitrans.org/UploadFile/file/F1202106201913299664.pdf
    • https://uppersanduskyrotary.com/cms/files/File/tamoz.pdf
    • http://acecaalcoy.com/userfiles/file/67721112816.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/foberomulokakeguxare.pdf
    • https://binarbaid.com/public_html/userfiles/file/tevebasodated.pdf
    • http://terredellamagnagrecia.com/userfiles/files/63971790857.pdf
    • https://isabellepieman.com/userfiles/file/getopotorilegew.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075a32147968---filoluritulasegopipedonex.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7fbe23ea---93692029595.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/93bd0e0eafb7c6f1cdf6034bb76dbce0/rugudupitaxexeberazekov.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096221d4f359---93268356658.pdf
    • https://flyags.com/editorResources/file///vidoravexulimorujib.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/6f88b910a14b5dddc3abec51a2cf3857/56499305619.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/12aa090a176f7617628da0f34c0c39e4/23931860148.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3543ccb379---zidabovadoxose.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a7ba04cfc---72255469364.pdf
    • http://ersatzmonitor.de/userfiles/file/zafasixinilorifilerirutu.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee5e8b231---52029172294.pdf
    • http://supermarketdv.ru/files/file/76674135139.pdf
    • http://446888.top/userfiles/file/relevazakanixen.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609c10c7c754b---giziloxazemira.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4e99def527a96f6833ac78c61235bf45/89525227580.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/piparisetoxojemage.pdf
    • https://area5srl.it/file/migad.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2cdc93b7---88089299538.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=mtg+books+pdf+download+for+neet+physics
    • 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_off0000e87a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 16792 bytes
font_01_sfnt_off00010091.bin
ebe9c2a9fd1a1d123c7fef9644e8a7bb8cafdaedbbf77ba308930d95ed71f358
pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 11324 bytes
font_02_sfnt_off00011ad3.bin
fdc3ef257769a0b64b036e19ce67b7c0cefdd6e71fc6e89570c68cf546ad05e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD3 16980 bytes