Malicious PDF — malware analysis report

Static analysis result for SHA-256 7604070cc64c84f1…

MALICIOUS

PDF

71.5 KB Created: 2020-11-21 18:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: faae31646a0a9cb38cdee03f40cdc418 SHA-1: e725c57d229417d80db5dc01f95e67dd1354bb47 SHA-256: 7604070cc64c84f193a494fbfbe7192ddc89b2175554c1c1a9f3f24023a9155b
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms designed for SEO manipulation. The primary heuristic firings indicate that the document is intended to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous malicious links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=the+giver+literatire+guide+-+conflict In PDF document text
    • https://tanutefezuje.weebly.com/uploads/1/3/4/4/134437554/bukajijofapegul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fa37143b22d1.pdfIn PDF document text
    • https://zefufewik.weebly.com/uploads/1/3/4/3/134374544/pupuxekaxivubu.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/bikalepi.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/c84c2f1e-5229-48ed-abb1-1bde575f3b39/value_city_furniture_new_jersey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeabb9a3-4163-4b23-bd6d-c6a411176924/jokoforafitigususatutizit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4c0a86-e232-45b3-b462-2de0e6c0b791/47873167179.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/lerumelet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7e4dfe-e801-4853-b581-7d27ea4e3849/34245858124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29c8623-910d-4716-b476-6fb46193d043/33791256783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d91705-be77-4a1b-9182-cdc8b2bad90e/bulova_watches_battery_replacement_tool_kits.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/giuseppe_conte_cv.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/aar_manuals_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c864c0ba-c884-46e1-a7ce-b9e38d320f57/65281897243.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/47111246945.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_off0000dc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 5148 bytes
SHA-256: 9f1d1cb4ad813da7dbc2baaa976dc9a691a31d444b853c12e91205cf613fa7a6
font_01_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10084 bytes
SHA-256: 136a620b01f6ceb8fab475dad91e8e1ca96fe95380d12e6454adbc9e768ea4b7