Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fcd9b634f85f61…

MALICIOUS

PDF

88.5 KB Created: 2021-07-30 22:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 152b0ff3901f058ed6b253551dfd09f9 SHA-1: 0727bad215b1be2310d6bf8413a5c8b68722a74b SHA-256: 64fcd9b634f85f61a200f8f2f78808ece19b121815360388d3d6c63f9665d7e5
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 websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xycrusher.com/d/files/lofofabevamekuvozite.pdf In PDF document text
    • http://marleenjansen.nl/images/uploadfiles/zejipelosem.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/46045086748.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/51872759987.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af7717e65c---mutonagavijifibiputab.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/ribawavupudaxalaf.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/nojudobuvi.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900974af7a5---28122702256.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de8d1540bad---zofifotuwopebazis.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/52433300964.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/ef9b53f0be6259cd1d1700863a00ad75/wufugima.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075387e5a393---44163923026.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/kemowoko.pdfIn PDF document text
    • https://groupunsur3.com/contents//files/kobavalinukud.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/avanjjqcm5u438bbkeo1esd8e4/mafazogomakem.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/komivenidumodusun.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210515113517.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/k3in94c028rglrsqrkb580tmtm/jikinikiwaresapolavu.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/7oeda7h78jtcsv4rmes1v2mmiq/37364981844.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/padufigigovovabep.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e2693471399cfca6316094b9c3e8044f/kevupiwodofatonoxe.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nidanadam.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/21ac3a6972f3f97d0e0af34e1a1ece6f/9341161325.pdfIn PDF document text
    • http://tms-operation.com/upload/files/pukodaduzivijelamugezog.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f0123b8c57e---17080495794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=canyon+furniture+company+bunk+bed+replacement+partsPDF 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_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 11256 bytes
SHA-256: c7930007d7447cb9307aeaade4d31d66a1e60f1920bb32c783d1b4a45e37823a
font_01_sfnt_off00010b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4C 18272 bytes
SHA-256: 5eeeb434c74221df33977aa0772efa632ce1d57e49316a98d400c0047c7393b8
font_02_sfnt_off00013b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1