Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fd199ccb7e9c71…

MALICIOUS

PDF

76.0 KB Created: 2021-05-29 09:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e65f4b215be425c35858e199f9ae2eab SHA-1: 9b2670c117a3fa4f79ee26bf46a96ab7f7b271de SHA-256: 17fd199ccb7e9c71dae117ec244ba72107455748e5b9ffd5ad234f90f2d58a35
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://pelibifir.ru/strik?utm_term=church+membership+information+form+template PDF link annotation
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/479894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381978/normal_5fdf0e44a6844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_60604354d1726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_6037ea319bd2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ffa392d2f6e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_605d6e25e72df.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/zekiwesa.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/6520530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_6050658a4525a.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/b55769fe-1994-4393-b540-c29b4b77c43a/who_makes_kirkland_hearing_aids_for_costco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a54d6a8-19cc-4eec-bef0-281d343cd5a9/cuantos_gramos_tiene_una_cucharada_sopera_de_azcar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3156eb8e-0fb9-40c6-8b4f-a2107db70733/how_much_does_starbucks_pay_in_georgia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6fc63b-cc80-48c5-8243-8d5ebf1d6452/ccna_routing_and_switching_complete_study_guide_exam_100-105_exam_200-105_exam_200-125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47982405-8955-44be-ae65-d31a50d81b2b/jipapupegasirojuvoxuzani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f77d81f-779f-4f91-956b-cb96abc8b2ce/pabexipitutenabega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8dc777-2188-4025-9f7c-e375c33ec937/38227242125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87bae34-e89c-453f-972d-a11f38f5316b/vba_worksheetfunction_maxifs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b908c426-3a9b-4256-bfde-73d5886db3f3/14005846737.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_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 5300 bytes
SHA-256: 9516cc263d769ae5146ca49b8e421f6e035222eee6bda2dead68c74657704f37
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 10396 bytes
SHA-256: ae597aa74fa96194647fd4419f946b93a3d29604e5054d9c9e441a6606bec7d3

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