Malicious PDF — malware analysis report

Static analysis result for SHA-256 694dae36803894ac…

MALICIOUS

PDF

65.2 KB Created: 2020-12-08 15:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: df5c90176271c30dee3d41e822627a11 SHA-1: 2cad7c3f7956387812e0d3f1bbbbce444c865240 SHA-256: 694dae36803894acdf38731167d56d3e5f4a2bb91aed81ccfe19e00739ffa42c
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 0.9998

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://ggtraff.ru/strik?utm_term=saguaro+high+school+mascot In PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/960b96b0e.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/kerepufamovetorofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fae9cee03233.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/785a665b-6702-4967-ba18-dbb8a6ab00b5/braun_series_5_replacement_head_52s_52b.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/collections._sort_not_working_android.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/just_build_lol_2.3.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/canton_high_school_football_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/editor_file_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b87bce8-4bf7-4dd5-8312-8c149b37f7f2/gmat_math_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/biogas_plant_model_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/napenapabonozix.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/kiberediwugikixeb.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/vechain_price_prediction_may_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/hardy_weinberg_practice_problems_answer_key_with_work.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_off0000c077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC077 5316 bytes
SHA-256: 6bb8fc362ee389f47f963590a0f425086f8e789f4278fffd88cb75050f313da8
font_01_sfnt_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 11524 bytes
SHA-256: b392cb3555e7a104a74251e4fca25be573753dce4576590e49927f16ff64479f

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