Malicious PDF — malware analysis report

Static analysis result for SHA-256 0321b07082959f45…

MALICIOUS

PDF

84.9 KB Created: 2021-09-19 17:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8542d8fb44ad3ba2c2a61af824d693d SHA-1: b1c6b09bb8bc82cc87e98bdd60595fad05daa0ef SHA-256: 0321b07082959f45c35a9311c412bc1cd5843867d635e16b17da4e5a1d13e696
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to lure users with terms like 'fortnite free v bucks', likely leading to phishing or malware downloads. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=fortnite+free+v+bucks PDF link annotation
    • https://sportyou.fr/ckfinder/userfiles/files/mavubokesoraroxijuribajip.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/ramanuvejezebivone.pdfIn PDF document text
    • http://nemochem.cn/upload/files/godagikigepafuwakobu.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/dozipewulekoxobetirilozes.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/45369992996.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/gosege.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-2/20210902185552368829.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/cd0f9992670981f2dd900fe6e6afc4e9/bopebamu.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/63239032078.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4f31d9891690d8797b1f9b0de2c8fe66/nopevuf.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/zabupufivoworekaka.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/91075656810.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/besowiwibusefiluguzuk.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/59514361401.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/pudak.pdfIn PDF document text
    • http://headrepublic.pl/images/files/niziwedinuganogijog.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/12530596999.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/13157282282.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/2ba39154abd83544ac2306aaa91d35d4/libubadorexinufupas.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/nobineritawalarebusemosa.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/wumosubotatukesoti.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed6211806f---pukigoxupa.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/70275014613.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/zitew.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_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 19604 bytes
SHA-256: 355f6d1d37e8107fbeafd11aea3ccf9c581e1a1152f80f8c917eeadd5970c53d
font_01_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 10496 bytes
SHA-256: 941bda7e10b1697a935b0b7cec81a96f7bb4bc66220353735549f8e1be414283

Open this report in the interactive analyzer, or submit your own file for analysis.