Malicious PDF — malware analysis report

Static analysis result for SHA-256 82634b62f019fda5…

MALICIOUS

PDF

63.5 KB Created: 2020-11-14 08:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a505e9dd4019ea63c3e4b4f9aac8d56e SHA-1: be212944678390b86c83bf78df142116752b5bb5 SHA-256: 82634b62f019fda58f56f945bf7a313c77f63ea1ef8469939d8b0aa4da62cc8c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of a link farm and a critical redirector link suggests the document's primary purpose is to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffking.ru/strik?utm_term=moldes+fofuchas+para+imprimir In PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/kumepibut-xasuv-zevib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f95bf41bdcbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f9ffe8e0b37d.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/29c2349a-4e85-44f5-811c-ecaf10706755/jisadara.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/secret_garden_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffceec3b-eac3-47ca-a13f-6b4c7f5ea017/94878442830.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/ipl_2019_schedule_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff8b120-cce1-4984-90e2-8ac0a755f250/reset_maintenance_light_toyota_camry_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/if8791_spanish_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84a8e16-6385-4c0c-9b5b-cc38377cea12/woxodasupipololeg.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/4_bit_adder_circuit_diagram_7483.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/love_stargirl_online.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/cooking_mama_app_store.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_off0000ba5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5D 5400 bytes
SHA-256: 848815158db7548a19449e4533129d34b0fdb5c10e761ab41dfb385f5edd0397
font_01_sfnt_off0000cca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA0 10584 bytes
SHA-256: 130558c0fad72e4371690007761615f00156061452da05e787b3ede2df6baf23

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