Malicious PDF — malware analysis report

Static analysis result for SHA-256 6698a17e46524a4c…

MALICIOUS

PDF

92.6 KB Created: 2021-09-10 09:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bf0447ea77fb3577f2daea824c03c735 SHA-1: d9b4e0d8fc824852ae302507b93d227ef7657d5a SHA-256: 6698a17e46524a4c64aba9bcfd75af9d95645f7f85a0dcb0f912b3ee5a6460db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The `utm_term` parameter in one URL indicates a potential lure for pirated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=hitman%27s+wife%27s+bodyguard+2021+full+movie+online PDF link annotation
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161319a45c29a0---pitinetaferoxabat.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109091124097761.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/kisuvawojivuzizafifivile.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/92f0c47b80e54697880cee5778b58469/forozipobas.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/97685019908.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/levejoxovuparizuw.pdfIn PDF document text
    • http://yoron.net/up/files/debezowotawepivele.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8foj5vravvh2chdmvlcs9lnr12/dufamepenaxorom.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/pazaganuwula.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f555feb9e1e0a4329d816a029b72723f/15088939843.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/mebazifefusisezok.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613917ef172b9---peduwovuwu.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/88825889422.pdfIn PDF document text
    • https://anjingliar.com/contents/files/95688064853.pdfIn PDF document text
    • http://farashimirooz.com/files/tutamevoguniv.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/mafukote.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210908115404.pdfIn PDF document text
    • http://naso10.com/userData/board/file/22177724963.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/23682827031.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/7171408551.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/mebogovevapadol.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/numanexut.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_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 11520 bytes
SHA-256: 1b93123dbe6109db7ae0ee11a4edc95bc3f6084a1c64ccedd9650dbfaff0237a
font_02_sfnt_off0001318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318B 19484 bytes
SHA-256: 738a332afc760713e2d7f375581fa0cbdccee8df596eb0e20f7a8450e1a88eba