Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c379474d3589d5…

MALICIOUS

PDF

92.8 KB Created: 2021-09-14 07:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95ea722d15f974213800a20ad3fa14ab SHA-1: 54fe0418b5796c10845775aa97c92ecfa89aa6c7 SHA-256: 36c379474d3589d5c22ef408912125406a1e0c4cb9dd4fd850ea2d13dce9de66
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, presenting lures related to lotteries or prizes and requiring parcel delivery. It contains numerous links to external websites, some hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate potential malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering to lead users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://pistant.ru/uplcv?utm_term=photoshop+how+to+export+as+pdf
    • http://webinaris.blog/ckfinder/userfiles/publics/files/sofuzokavoleb.pdf
    • http://chemtron-vostok.ru/media/file/77155789938.pdf
    • http://urbanelect.com/userfiles/file/kunamusukamegaxamat.pdf
    • http://magooferta.pl/uploads/fck/file/futezozomide.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132d13266d64---tumesimizaluxewaduriji.pdf
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/34641471760.pdf
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/jazerimajobuvozepuk.pdf
    • http://bertrandetgastineaudesigners.com/userfiles/file/5879547966.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d814fcd110---julixezitijezepimona.pdf
    • http://www.motocams.cz/ckfinder/userfiles/files/36590676013.pdf
    • http://kaitianjinghua.cn/admin/userfiles/file/202109021322207571.pdf
    • https://ost-fogging.com/upload/files/tutas.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/s0i6fo9vo3im074bfukpt8ocr6/fovisopo.pdf
    • http://sicilalluminio.it/userfiles/files/52889892517.pdf
    • https://indicaperu.com/userfiles/file/gogutinodigadan.pdf
    • https://poulinstrapscan.com/userfiles/file/tudus.pdf
    • http://mindatpeace.us/uploads/files/zaviwofozimuwekotelo.pdf
    • http://engcaphone.com/_UploadFile/Images/file/11013128311.pdf
    • http://mobitransjogja.com/files/jomubipidetevaxisesovedi.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302fd0efc09---likadamid.pdf
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/fivakosujolodijenebuvi.pdf
    • http://mercuresamuichaweng.com/admin/file/35783433135.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140059b65f86---29146181627.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_off000104e8.bin
78f6832f885baf57bb89873cc0b63481ef36f863a5dd47b95c2daa5b640745e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 10540 bytes
font_01_sfnt_off00011d2d.bin
d5970ea9e1fc1b19eac8088a16342e27608022c66078f3c9f871f62aeefd9add
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2D 18424 bytes
font_02_sfnt_off00014d58.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D58 16792 bytes