Malicious PDF — malware analysis report

Static analysis result for SHA-256 02add3944622b769…

MALICIOUS

PDF

83.4 KB Created: 2021-08-20 20:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 1193e2e002a157b024d0312a1d07a523 SHA-1: 41cffe53fa703bb43aa114072b46db75560ce0be SHA-256: 02add3944622b769b45854e3057d1fa43a46d32b436e0dc1375711941fe99f6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e45f7ab4f03---65346696650.pdf In PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef9a7471d---lojage.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/fekuw.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/fedizafarok.pdfIn PDF document text
    • http://landia-print.com/pdir/file/pulirusunuxixiwemaniv.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/f89cc77683e12efaa83ef399bd3d3464/14048515918.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/geborutadikamoxasosenenev.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/81944310633.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/taleko.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/zixilanosolamepem.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/96911310994.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6b221862b---64026001364.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/r77qr10k46tim4isbe1op78h50/dibusaxudemafudimelal.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f65bf3d05---fotiwagozakiveganobozasej.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983fca89277---73262109283.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/4393135637.pdfIn PDF document text
    • https://harom.ro/files/file/15645200912.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16118e28bb40f8---33685910084.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16100f017908fb---vodoloxexesoza.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/jivuvovuwanum.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/89222011270.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/dudeziwizuragolewuwe.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160708d996c37f---segakilajikipowarenamusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=if+the+atomic+radius+of+aluminium+is+0.143+nmPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 16340 bytes
SHA-256: 075b4e9aac7682c1f5e6cc83c54f441ac72c91b7fd1e740a85ca5bf989983a56
font_01_sfnt_off0000fead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 11280 bytes
SHA-256: 6696a91a06cec305a38538841f7c81fbec91683be8c7e2cfb1a47f14aa87185b
font_02_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 3172 bytes
SHA-256: 18a7252f2f3003f5b464b74c66c9ff216626068dffca05857f43b4e9ba515212
font_03_sfnt_off000125dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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