Malicious PDF — malware analysis report

Static analysis result for SHA-256 c972f244677f244a…

MALICIOUS

PDF

86.2 KB Created: 2021-03-29 06:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1947bb681aa7a356ed6950a29df3cd52 SHA-1: 59372e26b3d3dd1e489ec8c0c281916cd568eea8 SHA-256: c972f244677f244a17ebe039be4eb4c3cee922568e124e1c97a9813eb6f45cb5
186 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/aws?utm_term=divergent+insurgent+free+movie+online PDF link annotation
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/712394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_6052ce211864a.pdfIn PDF document text
    • http://thiswaytovogue.com/43322235672kl6kp.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/tegujojig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5ff23b8e12b81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f5542e7c-89b2-4248-80fb-5583a13ad90e/how_to_crochet_a_sweater_vest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8d9a36-f688-4669-8607-3da4e4f1e775/jesagu.pdfIn PDF document text
    • https://b416d2a3-330e-4518-8f5e-c931256b4cd1.filesusr.com/ugd/5168b2_10df7218e10c45cf97c0df66ee0d3eef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a341c337-c57d-49a9-b6ee-a8809f0c83ff/jopevuzazulexobuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f335e2c-8c3c-4816-8a50-158981019fd2/lemuxedes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96fefbf-a468-453e-936a-ac72a316a9de/50100874716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79633870-c9f7-4388-90c7-32ca57d1d939/dalovalopubozadokat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8593cf7-fdbf-4654-9c34-a0a8039190c9/woribor.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_6ba2cd837cef4c5e831c57adce49deaa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a61ebe6-b325-4f60-b67f-57ee20036910/budiwezuben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333439b8-048e-4911-acd3-26e2e7506dd2/87319755708.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_off00010707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10707 4820 bytes
SHA-256: 0860f13750542fec66024770537dbd8e5937b28237b74c8ab1d94e14332c57c0
font_01_sfnt_off00011766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11766 11316 bytes
SHA-256: 103187e736181e8f0cf9c33266efb6bb0b1ec1a44ffafc632d5f9b36e854015d
font_02_sfnt_off00013d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.