Malicious PDF — malware analysis report

Static analysis result for SHA-256 d705368c7e9ddf1d…

MALICIOUS

PDF

85.8 KB Created: 2021-01-11 23:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 724a6ed31bf1474ff81ec34f17b1cdf5 SHA-1: 0de73f2190e6de344dff1f380d7a40ae1a921f44 SHA-256: d705368c7e9ddf1d486c2a5415153b032f682bcfe42c5ea8a23d761fcfb52001
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=celtic+park+tour+guide+job PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459027/normal_5fb4e996ca3c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5fa6d1d6428cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f919437c76ff.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/9264166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5fe0e9d88f242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fdc0b9af2a60.pdfIn PDF document text
    • https://site-1166601.mozfiles.com/files/1166601/asteroids_close_to_earth.pdfIn PDF document text
    • https://site-1172703.mozfiles.com/files/1172703/74404370453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5f9bd1e9af84a.pdfIn PDF document text
    • https://site-1247346.mozfiles.com/files/1247346/47406605349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_5fd1eacc92038.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/7411277.pdfIn PDF document text
    • https://rizenuwav.weebly.com/uploads/1/3/4/3/134335920/7249116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fc95bc9be638.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 3136 bytes
SHA-256: 6487091c0070741e646db4a1cda49bb5dd8928231115cd9838b724a369c8679e
font_01_sfnt_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 5248 bytes
SHA-256: bb96b984a5a2376ff070dbbaaccbac94e1f0a5d022bb2129c7f3078fce16a28f
font_02_sfnt_off0000fae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE1 4668 bytes
SHA-256: 8541bbe1f2d55688a1a5c96e88d37db1e266f12b030b0523b9b23e98365528e0
font_03_sfnt_off00010c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C94 11864 bytes
SHA-256: 8bd15616cab56b5253f728df53907f588fe8bec9b76de48afddad6c7aea9aa59
font_04_sfnt_off00013464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13464 16040 bytes
SHA-256: a21863d0177ee3b35918e0726ac15f3bc1cce61b13ff55423fd45eb6b87fc173

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