Malicious PDF — malware analysis report

Static analysis result for SHA-256 7890b3952c769372…

MALICIOUS

PDF

73.4 KB Created: 2021-05-24 00:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8c247a3d2aa45929ee3646cc73dbe06 SHA-1: 514a06ed3992cd16454c57a77c5ad0a9675c3338 SHA-256: 7890b3952c7693727d331974396ca03a01824321502cb49387b72a11766e47c8
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting a link farm or SEO manipulation tactic. One critical heuristic specifically identified a link to known malicious redirector infrastructure. While no scripts were extracted, the presence of numerous external links, including one pointing to a known malicious domain, indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+fold+go+by+goldbug+shopping+cart+cover In PDF document text
    • https://vifawadezak.weebly.com/uploads/1/3/4/8/134846548/fosesugirebob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_604d9d81dcee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_600f118fe967e.pdfIn PDF document text
    • https://nasabera.weebly.com/uploads/1/3/4/4/134447265/xamapumaw-sefolun.pdfIn PDF document text
    • https://rasofenetiko.weebly.com/uploads/1/3/4/8/134862321/893712cf35b5f75.pdfIn PDF document text
    • https://nenuvive.weebly.com/uploads/1/3/1/4/131483155/fenulosowenamoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6036ca0c731a0.pdfIn PDF document text
    • https://vupebuxotilejo.weebly.com/uploads/1/3/0/8/130814562/320956.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/d4ebcddd1a7dd6.pdfIn PDF document text
    • https://sizugive.weebly.com/uploads/1/3/5/9/135993047/87d30fa3.pdfIn PDF document text
    • https://kinezamoz.weebly.com/uploads/1/3/4/7/134745204/bofiwudo-gawuretezid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_605b9f23d15cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5fcb0f3d21de1.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/kovozenamofox/audi_r8_performance_v10.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/bulk_density_experiment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/guzawinugipuzonifopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de96dba6-7fac-48e9-839b-cb2c92c1ec07/kalender_pendidikan_tahun_2016_dan_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4baafac-11cf-4e73-a740-ed872ce84268/roxozewamowuzenimapigam.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/beech_hill_primary_school_luton_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/zizonunidorovafuxezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1ada1a-4a81-4f38-957c-682bf3cdd96d/ruselafe.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/gekefumolofedovawufi.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/business_card_icon_png.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/awadhesh_premi_ka_bhojpuri_gana_video.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_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 5772 bytes
SHA-256: 88c586577c94fee7c23806d980d91d8134943f8dea1ecc8fb32c717134876476
font_01_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 11176 bytes
SHA-256: cd4a27fb9189745f1205dd00a8b7e369221b86306483e3c1253d17cc25fd83d5