Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7f5358327b2536…

MALICIOUS

PDF

84.1 KB Created: 2021-07-04 12:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94b521a3b95e47e631b7713de3470495 SHA-1: 0d7b60896a0fd3eefe289aa8d02de4792e04a0ce SHA-256: 7f7f5358327b253622d1415ff4b5cdefb8699e95b260d2a70cdac6dca1f532ee
196 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of an advance-fee scam, containing language related to lotteries, prizes, and parcel delivery requirements. It also functions as a link farm, directing users to multiple potentially compromised WordPress upload storage locations. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • 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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/b00ac25778d990cbee9a8ad99140fa61/36464354984.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089656c001ae---92469374518.pdf
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/wubuvikezatizujama.pdf
    • http://citescolairedeledit.com/include/file/56246928106.pdf
    • http://namuvaldymas.lt/userfiles/file/73525820010.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609639012183a---wulegisegodavusadevol.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/jifitu.pdf
    • https://jamurgoreng.net/contents//files/52638508534.pdf
    • http://novichiha.ru/pic/file/najuwufawujafaxo.pdf
    • http://inspiredindianfoundation.org/uploads/vimuwemubi.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/4109fcf5b796f0ec754d7c150c2f5e02/35453559723.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/9iddkj559e0cknjovi2q6s6dno/vuvufugafulilupumoli.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8f7d1f89---goridi.pdf
    • https://baohohoanglong.com/userfiles/file/14339627123.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608b228ec83ca---78505460517.pdf
    • http://seanmore.com/userData/board/file/119357432.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e2j5v5ta5dltihs0n5t41pr6r7/77576966867.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/a13235469c1c00a0c0e262f21f317c4c/zaxixinofodu.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/04a1b87f085e675fd4db5760a33f88db/29340796823.pdf
    • https://study-abroad-travel.com/ckfinder/userfiles/file/zukevote.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/9fc07aae12ec2fcd2cf6ae564bf80ab1/48403640142.pdf
    • http://asbazainville.org/userfiles/file/gogaputijopofazadofivex.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/6ddfdeb4dd65aaf3db4e01d11dc5c5db/20681167884.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c169a2c6f---dijuruzimoxig.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=nsdl+compliance+manual
    • 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_off0000e588.bin
7bd9338ed5840f10c4a5b104c6ec28a776553a6e40203c0abf2f3deab2c2731b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 10552 bytes
font_01_sfnt_off0000fd81.bin
c3835ecee11ba8b2e692eaa3ccd639848df337cbd7f6cd59da67b0472667c9ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 17420 bytes
font_02_sfnt_off00012b51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B51 16792 bytes