Malicious PDF — malware analysis report

Static analysis result for SHA-256 e746f493fbeb3010…

MALICIOUS

PDF

83.7 KB Created: 2021-05-31 13:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7ae09668afa24fb5ab299c9ce680ce3a SHA-1: 5f5b73353ba7a3a9fa0b9f74fa8095f4fa023ecc SHA-256: e746f493fbeb3010cb935e091a947c4b3061ef8e7ae1c59685162ee2e5ff535e
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as a phishing lure impersonating the Walmart brand. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to credential harvesting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fisudobu.weebly.com/uploads/1/3/0/8/130813554/1724437.pdf.
  • 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://bologen.ru/strik?utm_term=how+to+fix+melnor+water+timer PDF link annotation
    • https://fisudobu.weebly.com/uploads/1/3/0/8/130813554/1724437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5fec8e7c3509b.pdfIn PDF document text
    • https://lopuradusat.weebly.com/uploads/1/3/5/2/135297354/zojusaxam.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/ganavoz_regagiguxekumu_womitudojapab.pdfIn PDF document text
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/4344470.pdfIn PDF document text
    • https://povixifanob.weebly.com/uploads/1/3/7/5/137517449/lazetijojupowi_vutinewife_museki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_6032b1b42def8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_606555cab79c3.pdfIn PDF document text
    • https://gegelejete.weebly.com/uploads/1/3/7/5/137500710/pexusudadamesa.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/luxebaxukuj-lilawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf032e8a-503f-479b-858a-f5c9bcb9ce98/remojewividotejajokifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7fa2a0-ac4a-4969-9698-6b1fe89dad3b/motorola_apx_6000_earpiece_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dee036b-b919-43f5-b8ac-1f0ecb7902a2/matlab_plot_markers_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224b3e0c-f862-4a7e-a377-23d6c9ad3b12/behringer_x1204usb_setup_for_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64fd5f7-7c8a-435d-b9ff-a02a58140b0e/49936344180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ba297e-caaf-411a-85e7-62f7d768640e/electrolux_epic_6500_sr_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199d7cb2-e366-4df9-a0a1-8e98bb6465ac/tosolevijadonasoped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe34b138-5980-405e-a9f8-478ad447d48a/88995705782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa06310-0906-4f24-bd44-76997c5ae8fc/what_is_the_message_of_the_book_of_john.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fd8d45-2bc7-4955-9c44-b4307182a846/side_by_side_1000_honda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd52648-284f-4f0a-944d-1937f87971c2/39358284423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe58d30d-8d60-462d-b25a-9576643ae4db/zuvukizofujoviwubasibe.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://scripts.sil.org/OFLIn 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_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 4856 bytes
SHA-256: 1cbe7368b50e0a61e28cc59553f59e240f83dbb59981660b0266d6f6466ebd73
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 11412 bytes
SHA-256: 0b5d1424b38daea265521097209f4e7cb69f36e4dade31293a570b22066311f7
font_02_sfnt_off00012a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A65 16204 bytes
SHA-256: 95f2a8319533f051e584a9e2aa38e8d42f7eb419abe795cf0dce2d6390e2c0a0