Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc46a36b00d976b3…

MALICIOUS

PDF

74.8 KB Created: 2021-02-24 01:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5a1de8165d91eaa632bb9c39f63003a7 SHA-1: de3e4b3cf338299438ab433f1412b07112de8b8c SHA-256: cc46a36b00d976b3271cc5cc2be5b209711b8c4264fa9cc03ae9de8cd76af8c4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely serve as lures to phishing sites or potentially to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/123?utm_term=how+to+pair+jbl+flip+2+with+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5ff94ffd262e9.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/m0hiHEW/15646346733.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/dolukeru.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/163338.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/Q9lhbhb/brimonidine_timolol_price.pdfIn PDF document text
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/1948681.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/ba26eed6e.pdfIn PDF document text
    • https://cdn.sqhk.co/posuwumujome/aT6FYfi/the_station_at_othello_park_apartments_seattle_wa.pdfIn PDF document text
    • https://sufotope.weebly.com/uploads/1/3/0/7/130775917/bcc7ad51541892.pdfIn PDF document text
    • http://wivejudotimog.22web.org/tobelowimiroditavelil.pdfIn PDF document text
    • https://kawikixefi.weebly.com/uploads/1/3/5/3/135388441/929047.pdfIn PDF document text
    • https://cdn.sqhk.co/bofogarabu/tCbjjih/lofutifosun.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/xarojapi/latest_avg_antivirus_free_offline_install.pdfIn PDF document text
    • http://vedezaduxi.epizy.com/facebook_messenger_lite_for_samsung_mobile.pdfIn PDF document text
    • http://gewapapis.epizy.com/phone_tracker_for_android_free.pdfIn PDF document text
    • http://zifiwezuxibis.rf.gd/mutefagofepigepuje.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/85875789005.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/ligafadit.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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5352 bytes
SHA-256: 1bea15a033555a95672c22dcfa74cf93f1b4aea61eece2644211b7abc8cd1932
font_01_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 10952 bytes
SHA-256: 20dec39d90c138eedefc23fac73488c2c112b68048bce2d69245d496e5fa6d22

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