Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e09ad88f8375830…

MALICIOUS

PDF

109.5 KB Created: 2021-06-27 01:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab18b7d6056ee814acaa1aa08160a73f SHA-1: 3e8a3b30bab9a9713767aed4fc8380c3e5820b7b SHA-256: 1e09ad88f8375830187854776c3542ae476b5b2f4f30b90db9c90d41935c1ee3
196 Risk Score

Malware Insights

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

This PDF is classified as malicious by ML and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised CMS upload directories, likely serving as a lure to trick users into downloading further malicious content. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://drafthe.ru/uplcv?utm_term=outlast+trophy+guide
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68525d322---93259742890.pdf
    • https://cortopolis.ar/userfiles/file/52632899940.pdf
    • http://challendor.com/fckeditor/upload/file/76350809906.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/538fdb429506e8ba8ebc3e0b8fa9abc7/devesejizuvoboluwanim.pdf
    • https://ferdavagnar.is/images/fck/file/57788542501.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7c095e0e---mononewivapojevogafasataw.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a484c3911eb---76776551365.pdf
    • http://vetranhtuong.info/luutru/files/31091478473.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ad37fe9f340d9fd3268626164ff980c4/70957084837.pdf
    • http://esipro.lu/userfiles/file/feranufixovalijexaxogadow.pdf
    • http://polymer-optix.de/userfiles/file/39580990837.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4e9ab07c3---99964606757.pdf
    • https://hissekurban.com/resimler/files/gexamezanixojef.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vutclk6pm01sle6397jl1g1me0/184986005.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb6380b648---kemadopipusa.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/biojq9npl2e3p862vn0ski81j8/migavurijela.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ra4frp27ehtp53d3qt8s1optq3/50420924219.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/aq7sthi4app2phuqrsr1nb68ej/lonezosesamefepuwal.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/af221588a0504153579d70a3e8c34b8c/godolovowixurukexanakaguk.pdf
    • http://nensi.si/upload/file/revizatumakikewowodonago.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/gae950u1opd4enjie3c62g7h97/xazawajowuwuvinonadixi.pdf
    • http://chongros.com/userData/board/file/sekovovimunotowa.pdf
    • http://augustaelectricalwork.com/editorData/file/nivokibaxome.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/kqloksga9c6saogbksm24g4gad/vezasisepulosejewowadaluk.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b7ca02df0---17181195539.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001778f.bin
fcab64dab0911dfb83fb5ada3910219b749c1d9d925b756acf79eb2d3084d566		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1778F 16732 bytes
font_00_sfnt_off00011c6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 16792 bytes
font_01_sfnt_off0001347e.bin
105a98bd0742b58fc2bb751d42c4936916c0214e8eeceb0560c938b9b7b120d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347E 27508 bytes
font_03_sfnt_off00018f77.bin
636daf403f9ca56b137f0f5a3a8ebcfa33ba6deba7e282b9e3e9f0c407b14184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F77 10804 bytes

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