Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb0487bd49deba8…

MALICIOUS

PDF

74.4 KB Created: 2021-01-06 05:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5f57607e77d74a656b87b09155448e9f SHA-1: e2723d6d284a13ebd7f427a115e142c3693e2ac3 SHA-256: ceb0487bd49deba89e07d1ae9b91a4127dcca46943a7673a5b1dca0bf6c525b3
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=diablo+3+season+17+wizard+leveling+guide PDF link annotation
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/fca1b.pdfIn PDF document text
    • https://xopoloxunevagig.weebly.com/uploads/1/3/1/4/131406528/c8708bb36d70262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f87388221003.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/D1Fjfih/cut_and_paint.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/955ea83.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/2c1e180c-26a8-4ba6-bd4f-3e486cde6c0a/74336030708.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/90468507458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32732c2c-e8e9-4bc1-a681-0c8e7b3f79c6/research_methods_for_the_behavioral_sciences_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/batexonudoruduxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479b9f1e-ecb3-47d6-b8cc-f9532e83b8cd/kirusawodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5c0c26-d6c5-4bf6-8bae-630d9a3a8028/percy_jackson_lightning_thief_free_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77eb61ae-a0b0-478c-b593-3ec86714b2ad/how_to_get_chase_down_artist_2k17.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5628 bytes
SHA-256: 1761558e5b47dab67273a4f7f15d6dea1f371825247056d170a4b9d781f0e6a7
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 10596 bytes
SHA-256: 86ecaf21e3ca1d9152d2b9e905360fa1d42c839616d248e5d8ff0d252b907fc4

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