Malicious PDF — malware analysis report

Static analysis result for SHA-256 97533b170d65581b…

MALICIOUS

PDF

101.2 KB Created: 2020-11-17 09:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5c5e6ced752ca9e95784bbeb80020167 SHA-1: 96cd5ac4192d18d457e11d66e9b05d1f203c5c74 SHA-256: 97533b170d65581b50f886f9c6e0c4cb4d1d86d67d0a8e7c4c8c8c975d28c446
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=kib+monitor+panel+troubleshooting In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f898a50d3e5c.pdfIn PDF document text
    • https://letolikasepa.weebly.com/uploads/1/3/4/6/134625664/gasibune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f9b23bb65268.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/lupovopuba.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/pegej.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/dozabifi_vozata_pedukudugurimid.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/c46c7ca0-e31c-496e-b30f-d75f5143d42c/weather_in_highlands_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7866df-7f19-42e7-91aa-e90f8b30867c/yoga_3_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/sikalemutugafaxezekejotul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41868fb9-9615-47f0-9eed-7255c50e5152/77806249960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03cc1e86-b643-4d02-a797-aaddec7bfedd/44988642180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72710c7d-ac3e-498b-8ceb-81a6961f309d/statistical_inference_for_data_science_free.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/informative_essay_outline_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/impossible_quiz_answer_for_41.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc6fca4-5b82-41e2-a6ed-7b1572c48fb3/warawomowawilu.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/51938763205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad79270-ca25-4d30-aecb-bdc445477571/percabeth_fanfiction_period.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 23760 bytes
SHA-256: 26250dd192713ac100c0240ae1d83ef0489ee9479f53bf610bc7b791119716b8
font_01_sfnt_off00014c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3F 5340 bytes
SHA-256: 26277903e87201685b1fa84f7aba6adfb393df1cfe8111ad411c4dd92f26e121
font_02_sfnt_off00015e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E3D 11892 bytes
SHA-256: 111fac1ac5fe9567dccf2ce46b6f21586792ae8ea3947a05b1446d8b9cd34845

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