Malicious PDF — malware analysis report

Static analysis result for SHA-256 172986560029e714…

MALICIOUS

PDF

80.7 KB Created: 2021-01-06 20:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d552086bfc2e8ef7166c7c4a5a03889d SHA-1: f21a112a404fbcdba466145607aff87f52815f38 SHA-256: 172986560029e714a0a07d3a40703d0792844f47150b003271a8a0712973e180
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious or deceptive websites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm its malicious nature, classifying it as a phishing or trojan. The document body, though heavily obfuscated, suggests a lure related to 'Works of mercy for children' to entice users to click on these links.

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://traffset.ru/123?utm_term=obras+de+misericordia+para+nios PDF link annotation
    • https://lufuwoxataj.weebly.com/uploads/1/3/1/3/131379696/mugejobogedov.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/c92e77.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/WibhdPe/41580536291.pdfIn PDF document text
    • https://jetabasujupeg.weebly.com/uploads/1/3/4/7/134703241/mokidopisowuzonejuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8f456155fef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bepukuba/68520930352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10018ea0-8a7d-4835-8f51-719951f9d449/sonic_boom_sonic_speed_test.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/36381438298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f00b9b6-c87c-44da-b19c-d00b32cb093c/fl_studio_12_zip_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47934ab6-9d84-4b8e-b327-ee54558ce78b/tobias_funke_blue_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef4ebb9-068e-42dd-85ac-3197ca35b5ef/robert_kiyosaki_second_chance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24d68a5-68ce-4d31-a7ad-814b6f9e9e44/gefasojedofawutikofokafiw.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_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 5356 bytes
SHA-256: bac5151351848f6f977d9c0f17e88484c7eeee236117cb079a9139da138f10d4
font_01_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 11632 bytes
SHA-256: 04fd8990f5e4e5e0fa770af2571b57a92f8a0d3a579a01f979a9c881236f9df1

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