Malicious PDF — malware analysis report

Static analysis result for SHA-256 640c46889fe1ad09…

MALICIOUS

PDF

69.6 KB Created: 2020-11-14 16:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0027bc87392b86c7333c7d31602be438 SHA-1: d6cb18bd1e88e55ddbfa3cd546a45f19a66be972 SHA-256: 640c46889fe1ad0911a6446d5f882572228aeed66638679a7bd51618d929fa03
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 0.9997

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
  • 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://traffnew.ru/123?utm_term=ordination+certificate+for+pastor+pdf PDF link annotation
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/pasepavixufevowatose.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/e1cb94e7.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/480bf3c45.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.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/10425bfe-4edc-41bd-9581-fa5cd8174957/thunder_elite_601d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd950547-4f04-40d7-9ffc-f0d96aa621ac/animal_crossing_new_leaf_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383f5e5a-4e3b-4310-8d06-ba8b658c1164/10537498016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78ef247-0039-4b5a-815a-22999afc4017/glencoe_math_accelerated_pre_algebra_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323f2db7-2273-4f76-a8cc-309939677e61/clash_of_kings_mod_apk_private_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8cdc96c-4205-4f09-88a1-d355535bdeb0/what_religion_did_massachusetts_bay_colony_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b5992c-c0ff-4182-8b6c-5bd520493fb9/34461244106.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jefawepusil.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/molecules_of_emotion_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7310e7b6-7daa-4d11-8269-c4dcdd811897/sidekiduwod.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD251 5144 bytes
SHA-256: 8b01ca6c2cc9d412351cf32aa80fbdf3d8f990ace2109c34acf6d2c5e0f1944f
font_01_sfnt_off0000e3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DE 11240 bytes
SHA-256: 07ae0579381469a4ab2149b1f56e0a491d2315b878084374e3907acb5797d0f0

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