Malicious PDF — malware analysis report

Static analysis result for SHA-256 0245c5f391359fa9…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 20:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e34569d0dcb1d83124108ae12e496c35 SHA-1: 36b3120ee6f6c73aaa30414d26b3d3a9dff1140b SHA-256: 0245c5f391359fa9b66fb769233836fddc8efc5c5054f7ae8c84ede96545e827
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious workflow, likely involving directing users to malicious content or further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=a+to+z+telugu+movies+free+download PDF link annotation
    • http://imhyuk.com/imhyukeditor/userfile/file/6485555269.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/46360547565.pdfIn PDF document text
    • http://lyshiying.com/d/files/naxuwosomojatup.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/26687778762.pdfIn PDF document text
    • http://newtrichur.com/userfiles/file/buluxikaneberuger.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/bebidigow.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141a9fd21788---fogivumovewux.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/jonovolabaxuxunamazuma.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/u1agk2qi9d4envcqeko4imeqel/22942981867.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/nejidem.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/lelujunonupozotu.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/40928491593.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/18979567159.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/83348859610.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/61560434852.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/58528231184.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lugidipibimodaxuxopug.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/5419933565.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161366766c9e02---bubof.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f66f98ad42fe199ca819a822283c7732/26598082045.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/sazuxawipubaxadotenuzu.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/86dd3eaf0bf4ede3f1c746b68fc45584/lakawifuworezisoka.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-16/20210916221614554342.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/5286351871.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 17692 bytes
SHA-256: ce4975f9588c295aa8990e71635a92bafb78dda2349bcce292da804e9b85fda1
font_01_sfnt_off00011056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11056 10992 bytes
SHA-256: 6ac561eaa118c4fc1258c9015a99a68b5e7539fb9b9238888fad7c328210dc1f
font_02_sfnt_off000129c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1