Malicious PDF — malware analysis report

Static analysis result for SHA-256 4545c3c31a4cd3fd…

MALICIOUS

PDF

70.2 KB Created: 2020-11-23 12:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: abe54ca7ed9918814857cd70c306f19b SHA-1: b9d57faa0d6d211bceb3172fd950ead9cdd406d7 SHA-256: 4545c3c31a4cd3fd4544f531a5a11ed7382139e50d2aa1f0f6d49a2bfb354d0b
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://traffking.ru/strik?utm_term=electronic+discovery+software+comparison PDF link annotation
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/kemivudod-fotugak-vulepolu.pdfIn PDF document text
    • https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/2e4db7a3.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/39df1fbc1ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475988/normal_5fbb5b894e793.pdfIn PDF document text
    • https://jafexilodivoso.weebly.com/uploads/1/3/4/4/134499272/7539558.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/8a1fd7d3-e67e-459e-b46f-7081a93121a8/nuclides_and_isotopes_chart_of_the_nuclides_17th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/brain_candy_trivia_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744a9158-bbe1-4526-b1de-223bd0e32b2d/dafolejoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/lomisopixizawulinaroloner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a186552-eac6-462f-9d6d-33cf34515651/operation_joint_endeavor_patch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828f6500-9a08-4b82-8a29-831960043163/melted_iron_shard_bdo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba765dd7-ba3a-403e-8189-aad8c3c6bcf4/gozumizegavenul.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 5512 bytes
SHA-256: 37ce46f1a4dde22b6be1646e115e54ad49466a396f0b311845e4bfc349ee8820
font_01_sfnt_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 10196 bytes
SHA-256: b2df90b95647dcfffab25f69ed23dcc067ff9dbd46c3099b0f787ea2441a6f41

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