Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99106b610203620…

MALICIOUS

PDF

83.8 KB Created: 2021-07-01 23:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ebac8e564452f6f5a0d1050686fb6b2 SHA-1: 43428785ea11ecb7aa7eac1b3ccc7fd27367d0ee SHA-256: e99106b610203620bd6300d3ad092f7a58ff78e4e488d89f3704dbfd17b861c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm, with several links pointing to compromised WordPress upload storage. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://doganagolosa.it/file/jirutivegemorufugo.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/o8eape84bkvqc49c54vja47c1o/37000864829.pdf
    • http://chocoenglish.com/_UploadFile/Images/file/gedewigaxakuwuwiwusil.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ada29e8cfd9---zumewaxakunida.pdf
    • http://bafiti.com/sklep/userfiles/file/64539595921.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097374e1c2f4---sekusokegemidadazid.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d5371e48---digef.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/d08936b971312a74d71751929af7d1ec/monexejazatupezik.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3a83199fc08ac280245ecb85187e8200/zimiguruponojuv.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/f34735b1750d4e48acfdefc7cecbf09b/jezabobezafirijipabujan.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5c3623f3---javaguwuruvelegoz.pdf
    • https://paymentor.nl/uploads//file/guxivowezulewonujobuma.pdf
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/lakonejavipem.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a782856fb1c---70597797824.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc6c149c6---25039179767.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cb159de1a90---divofuto.pdf
    • https://autosaloncenter.com/uploads/file/75338069639.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/5c89b7106fbbf6bde3cd58879cac5e05/90461885946.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0f39b5a5588821cc785fa938050cf059/81979791256.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd999b47cb---maxesavitum.pdf
    • http://bobiniauto.com/userfiles/file/74483326929.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31ca6dbbfb---mubikapapotonunipato.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe50153ae4---xudabisogaxezoxiwiz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=kris+kringle+santa+claus+is+coming+to+town
    • 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_off0000e3cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 16792 bytes
font_01_sfnt_off0000fbe1.bin
275f266d319e546c97b4a3ee8059ff740b10cf74006bb53ed772a2c7cf4746e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 17020 bytes
font_02_sfnt_off000128af.bin
b22be0d8eda6c47d33ec52a4520bbf114e3101b65b023b775c8d6a94cb3f55a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128AF 10844 bytes

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