Malicious PDF — malware analysis report

Static analysis result for SHA-256 9476a1dc00c2073b…

MALICIOUS

PDF

67.2 KB Created: 2020-12-05 23:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 27b490f11b98cd6e22fd2fc056aac6e6 SHA-1: b1f52ddacd052361d2bf15b88c29e616e3605d69 SHA-256: 9476a1dc00c2073b6e389f04ed43c7114140b85ac30b0f114e236f192bc3972c
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-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://trafffi.ru/123?utm_term=dr+eric+berg+the+7+principles+of+fat+burning+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f9093d401125.pdfIn PDF document text
    • https://damoleruli.weebly.com/uploads/1/3/0/7/130776580/efb351b11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5abf4ec917750a3f83921/t/5fc70c210623334b0c56cd49/1606880290134/zijuzoraruxorafifil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d1089955c744b55487a1/t/5fc5d5c89ee0f32b871dd82c/1606800842157/67843173638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7316243a-dc62-468c-98bc-98d601eac260/mardi_gras_spring_break.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2be322e537a05ef1504ba/t/5fc7b6649dfc2a40452a02e3/1606923877658/dave_s_world_bowling_pro_shop_milwaukee_wi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125c0387-0d44-4c1f-8d7f-c4ad137ee2bc/american_furniture_warehouse_near_denver_co.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5104c9698b02c7f3b6a9a/t/5fc8248e094cf7617db548a5/1606952080224/20573699102.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bd09a5bc066edfc6a90b/t/5fc81e10217b3604edcfd1b2/1606950416862/guvozegonapekem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d2f017-32e4-46f8-a5ac-6689d2d684fa/junomuwowenexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bf24e1-b673-48e2-8522-e40cd2fb9135/sataxaxefiruzagiwat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3adab76-0cd6-4c4a-8572-39fe3753ac9a/starting_output_failed_obs.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 7

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_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 5636 bytes
SHA-256: 5dc96da666f04c578900745f9becae517a3026344237e8da9886a9432615fbb9
font_01_sfnt_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 10764 bytes
SHA-256: 89168757c96725ca9d8b14966549cb2afbd63f3782a129e5a5169255b7266a0e

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