Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc09e9bd4b64b9f…

MALICIOUS

PDF

67.5 KB Created: 2021-02-15 15:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a02bcf468bcfcd13045a0400556071c6 SHA-1: 03ac20d0e7e78402d34369422862d67560ec914f SHA-256: 9fc09e9bd4b64b9f02316d0b9e4f75bdd16cd8bc81d71ef00a9086a748146117
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to printer setup, designed to trick users into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/123?utm_term=how+to+set+up+my+brother+printer+to+scan+to+my+computer PDF link annotation
    • http://tadekigede.22web.org/razasulibonetoso.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/4e27145b1.pdfIn PDF document text
    • http://damvglaz6.xyz/pablo_alboran_discografiaw0swb.pdfIn PDF document text
    • https://woxoxuwavi.weebly.com/uploads/1/3/4/6/134689382/6dfa59b35548.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/Oqhadl0/calgary_stampede_bbq_sauce.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/63594eb1.pdfIn PDF document text
    • http://lixuzixewufixib.66ghz.com/attarintiki_daredi_dialogues_ringtones_free.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/91673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5feb9f5f4ebb3.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/cuento_para_siempre_camino_garcia0ebjx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_600ba2867022c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD1 5436 bytes
SHA-256: b3fded0b0739ab0761238bc56f03e19aa34c9d0b4c5db3f23ab1af08f560859e
font_01_sfnt_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 10348 bytes
SHA-256: aea32d47c0ad360e25441a5f148448ad844bab78fdd5a41a01d88caf3ade7841

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