Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb049d8b0759eaa6…

MALICIOUS

PDF

93.5 KB Created: 2021-09-07 18:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c99b083835957ff6fec65deb4be5f7cf SHA-1: 7f459b3e59f69b72e7673877ba72506026b7d24b SHA-256: eb049d8b0759eaa6df5927242631e85fd310eb04a6c5a1d5689ddba210a234e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://banghaija.com/userfiles/file/golusapidarasigajawizid.pdf In PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609747a679035---63166949830.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607056880c8fa---lujotibojavulolebitene.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d97c11fcd0---20004608715.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/remepepamawifulelebix.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/rukazajakaj.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/73387735425.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/ritegopozijapimuse.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a851d9ee3d---wagow.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/60689996008.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/e63e593f1b9a51d8e0d4932572dc4dfd/redawotafimuduwa.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/3667db923acedacb75d1b6ad7ed17087/fowukavexazutubotu.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/52353078338.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210612_B962F399EAAFAAEE.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/fogedowatakaxofesonona.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///21913700799.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/konutepenamijemopoz.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/28117484864.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/45090213747.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/jazuxugamufiriboxolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=cell+cycle+regulation+and+checkpoints+pdfPDF link annotation
    • 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_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 11236 bytes
SHA-256: 7ae7755c08e4115ce25b71bb8c00b25ed478433de558ff46bc6996a4f0ca8d17
font_01_sfnt_off00012024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12024 18956 bytes
SHA-256: afd3b9129946fdbccd3b82133a646e3d8c70a7665d190f895d7c3f867c4e2aad
font_02_sfnt_off000150bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1