Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1fda1784a0540b…

MALICIOUS

PDF

124.5 KB Created: 2021-07-01 00:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6130d48f93e04d6fa23c29c20b60090d SHA-1: 17a11abc71e6155e4ec116891b0bce1bc11f4823 SHA-256: 7b1fda1784a0540b0ccecd7cf201afd3780a246826429261ceadc125ad6c7715
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to malicious content hosted on these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://yournamebadges.com/withyourdog/cms_uploads/file/xotixisutizezemufato.pdf In PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7c9e0c1e4---29958183114.pdfIn PDF document text
    • http://gyobel.it/public/file/45387946453.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/79a4e2d11697b21dcc9e53a4246e516d/17383001850.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/380825417bb65ed783886d26a3dadb7f/baxaxub.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836310eb779---lakuzijupewi.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b4b9a638---56465805758.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/2a78b886fe8a236214568a2f5ab7ea8a/mopudezevofiforajumega.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2689cceb---bikosutefafasosopar.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/komubojoniwabojuvop.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/xowozuxifizipesu.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a286e3a482f---xinapufewowimem.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1987e84d17---54950114628.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ecd85f50---18049407984.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607120f0d19b1---dirixobonizawadavokezi.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/dasewidomamuxinalojeni.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160888dcc6373d---tuborojefusavapevemelite.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/mapawijevepu.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/aa0c1872763acebf60ef4cc18339d295/74538008362.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/7ffc1f4897da7588e098b2648b18ac79.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085d114cdb3a---5403752526.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/18093181782.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/vopimotepivurutap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=solar+cell+dopingPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/66265561967.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_off000184a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CB4 19128 bytes
SHA-256: 5a0e02781f6fd54e9d574e7641847764fb8fe2ecf3d342fabad21b80a0161efa
font_02_sfnt_off0001cd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD6F 10500 bytes
SHA-256: 46e031de15410d4bf0164b971dce34e9121ba63eb2f9e2e5298405e6d615a39b