Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7688ef53d10f1e…

MALICIOUS

PDF

79.5 KB Created: 2021-02-08 16:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 95866c39e377ef66eb0530357cb60b83 SHA-1: 81318c5775b568141aa4f4ca99204c41e81b43a1 SHA-256: 2d7688ef53d10f1efceee51c9ee62020955f801a9a66bce5bdd03985f8307584
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/aws?utm_term=how+is+biogenic+methane+formed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426408/normal_60170e11cffa2.pdfIn PDF document text
    • https://vamewifajezik.weebly.com/uploads/1/3/5/2/135297159/1d9bf70b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fefde49163a8.pdfIn PDF document text
    • https://nenusisuma.weebly.com/uploads/1/3/1/6/131606583/8687601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415946/normal_5fe3959b9683c.pdfIn PDF document text
    • https://reledizov.weebly.com/uploads/1/3/0/7/130775001/e1446faa93eb.pdfIn PDF document text
    • https://lupamotikodoja.weebly.com/uploads/1/3/1/4/131406453/nesopa_kutidafazejiza_vexutejijoz_rutufanigofuwef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5fe7f27e619ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_6007b5f2782e6.pdfIn PDF document text
    • https://dofufegudi.weebly.com/uploads/1/3/1/3/131381881/jodokipeno-tusabefokemo-rapesuxasatig-duwita.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/yn5qmja/w3schools_php_tutorial_offline_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/hbhhMib/23972012451.pdfIn PDF document text
    • https://cdn.sqhk.co/vujuzira/SRhdjjA/32869878188.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tapelu/kijor.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/photoshop_background_color_change_software_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 5596 bytes
SHA-256: f2c96dee88cd22e1b7bdfd5cbd8eb34292bcc4259eaae8b485adc94ae67ba0f8
font_01_sfnt_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 11460 bytes
SHA-256: b47e6a599fdd424d36d6c6b660dec0e1c07632cc1a930b88e94d1a9bdecd6803