Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b46704eda142df0…

MALICIOUS

PDF

130.6 KB Created: 2021-04-06 19:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a6c3de3d6bebf8fb928b5a0e75d22ebf SHA-1: e0734714ea52127cf673dd52b23747cafb251345 SHA-256: 9b46704eda142df0c01391409bd6c02d1971b9b7b034ee97c409ee5655871eae
186 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 0.9990

Heuristics 6

  • 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.
  • 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://fokemale.ru/wix?keyword=cars+3+dutch+subtitles PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5ff3f9bd75c7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fcb3fe8a9d93.pdfIn PDF document text
    • http://limigulel.iblogger.org/44098414887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5ff53cb3b2518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420776/normal_5ff4ee78f2441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_60328b8b40338.pdfIn PDF document text
    • http://scrlt.xyz/vakapezamekimarjnvyv.pdfIn PDF document text
    • http://cherrypimp.online/56630714872jvxgx.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
    • http://lowepasonadoji.rf.gd/gunob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e2b117-1ef2-4fbc-9db6-310a7f91a0dc/how_tall_is_manny_heffley.pdfIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_94af713ffece419d9e61d596f136d0a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c99a167-f6a4-4084-93a1-606b3d6ef991/80551636154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbe7dd0-5e2d-40a0-82e0-0be544e46922/college_essay_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576994fa-ff9d-4e02-ac90-fe571bfcd259/dbms_stats.gather_table_stats_cascade_index.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca64d86c-d41a-499c-a364-139874e36dce/cido_bromhdrico_frmula_y_nomenclatura.pdfIn PDF document text
    • http://vewizoxevig.rf.gd/91071279941.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_267e3cf279a54f7781094096066acaad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fab716e-6dd0-4f67-815f-af6c3f609f4c/1136158585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4603c37a-48f4-4271-a008-ccdb7dd99fa1/tfs_tutorial.pdfIn PDF document text
    • https://1c0525ad-74e3-41c7-b44a-ab8be2d0a3fb.filesusr.com/ugd/be19e1_791b5437f49b4c10a41b447382ca31a7.pdf?index=trueIn 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_off00018953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18953 5388 bytes
SHA-256: c46e1a01eca51fc987a0c9ad21e9d10258a08ec84078fcbf942909947a4072c9
font_01_sfnt_off00019c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C16 5020 bytes
SHA-256: a698cd498499f43cb0f684310e2a7dc7289bebeb19c99f3c18d9fe762b957460
font_02_sfnt_off0001ad34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD34 13108 bytes
SHA-256: 6d0384c2f8bd5d5c7a20df3794db82dc703de15bf83c3584279c2c5a4c38eae9
font_03_sfnt_off0001d701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D701 16492 bytes
SHA-256: 8a2ae5a4ae83092e21befb58caedf40846e8f80d040e70772f3f516107b53949
font_04_sfnt_off0001ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED82 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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