Malicious PDF — malware analysis report

Static analysis result for SHA-256 d464dd5ce395f029…

MALICIOUS

PDF

79.2 KB Created: 2020-11-16 22:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 219b443f5279ef996d69cb848bf1d6dc SHA-1: d54381864da0667708bc28825231416fd904c372 SHA-256: d464dd5ce395f029139383d3ed989b6eeea0008ec3579b83a9b4f9cad8246090
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 0.9996

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://trafficel.ru/123?utm_term=infinite+sum+calculator+geometric PDF link annotation
    • https://duxujofibedusor.weebly.com/uploads/1/3/4/5/134577283/rimojojo-wusexolazowuvot-jetojatobilewab.pdfIn PDF document text
    • https://subefurova.weebly.com/uploads/1/3/4/5/134505332/d764859ff4.pdfIn PDF document text
    • https://wexegupewafux.weebly.com/uploads/1/3/4/4/134443826/7bd969a5fe927.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/bd2ef7.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/675541f5-19de-44f9-83ca-def4d9c44260/4626619193.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/lekubalilik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bea052b-0059-46ce-b674-a6e9fed4fa7e/65444866137.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/fajuguvusuzafefobidemuz.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/11599830296.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/pete_the_cat_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/aristotle_nicomachean_ethics_book_8.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/camera_scanner_to.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/android_7_developer_options_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/sonicwall_connect_tunnel_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d957b56-a543-4245-ae2b-63d6113882f0/duxobimadudoluvameluta.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 5020 bytes
SHA-256: 453f10f9fe622a2056870b46fcddd7fda459bc3ce86f029b22c4ddfb55d73911
font_01_sfnt_off0000db7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 15684 bytes
SHA-256: 13637f8718e5a9a192f0d62fa8deb27bffb2321aa7b6afa8784a2f21cc4645c4
font_02_sfnt_off00010c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C83 16080 bytes
SHA-256: ae4c1039909c6b18400a693790947520403f0a9c3cdc5bdc37254682f4165006
font_03_sfnt_off0001212a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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