Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ace132ffae3739f…

MALICIOUS

PDF

86.3 KB Created: 2020-12-05 04:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3ba662f160efbbe867f60e09919492e0 SHA-1: dc09f5ec3435432f89cb566890c5b4034f150dea SHA-256: 2ace132ffae3739fbddceeabf64db6236ea21375b22a8e9f6c59d7462b7b8a28
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-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://trafffi.ru/strik?utm_term=the+stock+market+game+thinking+algebraically+answers PDF link annotation
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/3494265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_5f990c2121429.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/1780988.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://s3.amazonaws.com/mejados/nobibasudusa.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/declaration_of_trust_template_for_rental_income.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/mental_and_emotional_health_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/hazen_williams_equation_metric.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/brunswick_county_gis_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8162f08a-7dd4-459d-836d-ac0999b7ad04/30306247106.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/givoju.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/luxujefalenudapiwaruritik.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/50903904546.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/messi_stats_2012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839d55f8-6916-4a50-9c3e-4492270d9118/96193093508.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/luloja.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 5348 bytes
SHA-256: cfb775bf9d6146ab3e878747f56a17ee4188f583e81c51027c4b2ef310a86eba
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 10948 bytes
SHA-256: 54c88c5a876ac9c559125ba4dd751178ccb6eb3703b2841cc811dbe3ba8b889d
font_02_sfnt_off00012844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12844 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off00013d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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