Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b82a0f9b36f936c…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 09:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b98880a9f9ca4475dc15dfb06507eec4 SHA-1: 63c60fc7cdc57dfd1e9b9331af206b977dcc89d9 SHA-256: 1b82a0f9b36f936c80490f0980440b20bb934ead9527ad59ece9d5ce0f29cbee
196 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised WordPress sites and disposable hosting, indicative of a link farm used for phishing or scams. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into paying fees for non-existent prizes or parcels. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=how+to+write+text+in+a+circle+in+photoshop
    • http://alexanderjamesbackcatalogue.com/userfiles/file/tigipuvodazow.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcca4781859---jigeretivukedaxasozux.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2204a55f9---susovediw.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/2345061bc6a81cf69301140fcb4952a8/jelivo.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/fa1919085a2acdc9a9e3eada489cb2b0/18994020440.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b9f20dc5---pudawaweroxilakor.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/7425fefb0fcfdebb8ba88af80ce9e3c3/tigimumuzanutegubusuzo.pdf
    • http://botosani.ro/img/uploads/file/dawejidafujeloxa.pdf
    • http://www.aadhar-interior.com/userfiles/file/81260888240.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608a748fd37ee---5963241398.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609327d6cf822---roxorogopazuwefuko.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/58d3586feba411605c8a2fc5c5d4dedf/fanuwoxabefipof.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160822d00918b8---kolipobu.pdf
    • http://aggengr.com/uploads/CMS/file/vobigadepalo.pdf
    • https://gites-les-bardots.com/userfiles/file/zimidisamepurujawotekoxok.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/lf9eog3g8pcq1mt3hel0gu4c87/14655560578.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c570d0a38c4---xoviwaxobikedip.pdf
    • http://hanart21.com/files/userfiles/file/wugujavaren.pdf
    • http://igorodstore.ru/files/userfiles/files/podavove.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/ce97ca3ff0c9f305f2a8d47c305748e2/navezivew.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c1de3f50---64149182520.pdf
    • https://ubranni.com/uploader/files/tipitaminosak.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160be559a273b9---lizikedopobunologazukanuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e0.bin
60059c22071c1228a4bb3306c03f5bc7d39756a9a0c47045c6ad60e011dfc798		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 17832 bytes
font_01_sfnt_off0001259d.bin
1a0fac62eb220a1a69487c3a3f2e1df69c2e81a6eb39d456a27fd4e55e2c7316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1259D 10648 bytes
font_02_sfnt_off00013df6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF6 16792 bytes

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