Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c7616722b00545…

MALICIOUS

PDF

70.3 KB Created: 2021-03-15 08:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 414713c6bf5c0077cd1f6da6ecf7bf7f SHA-1: 4505f78986efce1d2c196a29f5bab6d4895e59a2 SHA-256: 36c7616722b005450c1113a0564bf67009cf709fa7a42bcfcb351e2ebd457095
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a technique commonly used for phishing or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and extensive URI firings suggest it's designed to redirect users to potentially harmful sites.

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://jottigo.ru/123?utm_term=city+of+ottawa+swimming+guide PDF link annotation
    • http://xevamoz.mygamesonline.org/psychoanalytic_theory_examples_in_literature.pdfIn PDF document text
    • http://helpcopyright-service.com/stock_market_gamestop_robinhoodbtjje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_603f0a6c12a61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5feb5d4b47b01.pdfIn PDF document text
    • http://vufiwopader.medianewsonline.com/how_to_check_fuel_pressure_on_dt466e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_60495a576f8b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425492/normal_5fecc9424c3bb.pdfIn PDF document text
    • http://7gusevshop.space/how_to_make_paper_from_old_paperhn5wn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fcc54ef6bb3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5fe51ebc3be48.pdfIn PDF document text
    • https://lukumupanulafaz.weebly.com/uploads/1/3/4/6/134683212/ed5c14.pdfIn PDF document text
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/bolinonowozino-sopawixosiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366336/normal_60011705c8533.pdfIn PDF document text
    • https://ladubikoniku.weebly.com/uploads/1/3/0/9/130969526/biloragubolowepiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuwunokebisul.rf.gd/video_file_compressor.pdfIn PDF document text
    • http://juwemijawikipo.epizy.com/73642428476.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_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 5196 bytes
SHA-256: 0d23e235c8841f80022700c02020c2f32bf7cbdeb37899674b808785fed5f1ee
font_01_sfnt_off0000e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 10936 bytes
SHA-256: d77c81fbe033d035a379d99ac61aa7ea9059284a30cc79669623e6463a6b7369

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