Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2365fa2432887d…

MALICIOUS

PDF

127.9 KB Created: 2021-07-14 07:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d1bfaf6acbd35ea571d164e9df1db251 SHA-1: bbd915fb7328e2302f3001ee4d1e08d64e46d336 SHA-256: 5e2365fa2432887d4139fe9be5f34470d3c70fe8b0ea65258cbf64e97db159e3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings and extensive URL list are sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://irlanc.ru/uplcv?utm_term=in+the+beginning+the+angel+lucifer PDF link annotation
    • https://kuraniterbiye.com/resimler/files/60077305796.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/17359f9289d8116e5d018b3a80e43074/36622411726.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb56085e060---pijoromifafet.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608460bced235---tasetakukexitonavof.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/71709441451.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/pekesakedozaxugibagokulib.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ec2jrsqrn44tv88ha0pikqso46/karekijexotomodipujabepi.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210622185657.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/powafutodifuzojarisupusel.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f24d91dab---52477596664.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/xumuwojofusavojupilir.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2cef22de---fozifawevapunuzepuko.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/lebazufewufe.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/cm3665ppvq7nlrv0m1bssla6hh/koziposupibukuzeratowetez.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/midewabopeko.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/mefoboginixoxututeximaga.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/7e79b958eafca163bfb98621305826c1/69597575739.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/gatakifapurifuserakipe.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/3927217796.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e5c63a442---16008116985.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a58623c1---ziwesitedotupa.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3a592794cfbe77c703b1f8934db1d8fd/56746726007.pdfIn PDF document text
    • https://atrax.hr/files/nixiketaxijuxoxidisi.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/jff0opiiggjqd8u1b37l6bsv7s/49593385201.pdfIn PDF document text
    • 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_off000175f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E0B 20652 bytes
SHA-256: 96d0fcf276594bbe9ed10c440dc5e197f4b8723aae7e7dc85b064eddc57d93c0
font_02_sfnt_off0001c279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C279 10520 bytes
SHA-256: 33e0f572dadfe73ca2d69692c7e187ac940a0446b094a41a5e5991021c9607b1
font_03_sfnt_off0001da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA4E 16676 bytes
SHA-256: 52cb80695222162fb776390e0998a2b1f4fc5ce28c48114730d15d78ff0c1926

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