Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8298a65bbba553f…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 15:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b062a7603837ac15ea464ec63985170 SHA-1: 433347b99bce441f698ab4ee126d12f8e575e9ed SHA-256: b8298a65bbba553f451c749ab41339d5974ab591d18b07b230a1001e4ecb01dc
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The primary attack pattern involves tricking the user into believing they are receiving a prize or parcel, which requires a fee, leading them to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=new+york+state+drivers+manual
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2d6f6238120e5d806f8f9aa7162ef70d/25967421665.pdf
    • http://harasim.cz/uploaded/files/31258186944.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ngljkeatkmnpramvpvmvgu5c7s/69650827939.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/1ci77f4jns3m61gltor4lar7q7/feworilulafewawako.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/jutm9a20pmautgj6t5lqtcr2ld/ruvejo.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b53b077bb3---56510045615.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aad7fb7ae1---27415893764.pdf
    • http://yaeram.com/userData/board/file/defobegotuxeberudupewinod.pdf
    • http://immobilieninvestors.eu/userfiles/file/jelojojatonedadipi.pdf
    • http://3dsami.org/uploadfilefiles/kuvibexotaju.pdf
    • http://status-go.net/gfx/userfiles/files/62992704106.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b23fa2932ef---rivapoxibuni.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098985695a13---81126569003.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/e6do1c5a05lkim8lgbgt008p0u/36211893579.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/rmouir3t2bbljhl3soc709sp8k/81017078560.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/72d936109370abc63ab2a10be6a72e7b/3485871648.pdf
    • http://tuclubcr.com/campannas/file/najuxegobekiboposej.pdf
    • https://rybczewice.pl/userfiles/file/58530757663.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160776d631954c---nuxekamiv.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759dbdc3b47---59300137175.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/163299f70fedf0463219e7360296f1fd/waguvina.pdf
    • https://triosms.com/userfiles/file/8177222997.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ef7f38d5---79718605184.pdf
    • https://aimhc.com/userfiles/file/sajomelizidumewejofox.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c70d1c470---33198500751.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_off0000f58b.bin
e66c857550982402e59239be99748f0a5be2cc2adea317f698d37fb804063e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 10844 bytes
font_01_sfnt_off00010ea9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 16792 bytes
font_02_sfnt_off000126bb.bin
35e70621c8f09ce58c79885ad272db47b9ed79eb40f244cb0801b3b9e6a4bf12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126BB 17576 bytes

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