Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b090695e3ff157…

MALICIOUS

PDF

82.0 KB Created: 2021-05-03 23:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cba298ded5e7eeb77690491b04ed80e3 SHA-1: 9c10083dd572352882135c6f1b53d5f5a12e6940 SHA-256: 88b090695e3ff1579b1b313e065e27ee0499864bcf2c9da5fb47bdce6da96416
126 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 by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a phishing or malware distribution attempt.

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 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/strik?utm_term=how+to+use+singer+pixie+plus+sewing+machine PDF link annotation
    • https://budonofo.weebly.com/uploads/1/3/4/5/134520747/vomabixupotoner.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/2132707.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/ZWidjiz/wisasimuwigupewijas.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/6764501.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/d9cnhhy/tupefurabesezo.pdfIn PDF document text
    • https://mepowisa.weebly.com/uploads/1/3/4/5/134595914/nesuxes_jikopo_gutisenuxareto_fanetam.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/hdn0KsO/ralphs_ad_next_week.pdfIn PDF document text
    • https://xomafenasaweni.weebly.com/uploads/1/3/4/4/134486242/merepojo.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/2012197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390995/normal_6002270d85d6a.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/Ohdgfx1/nuvadofafetimakusaviz.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/bwv_582_piano.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/ruvirilopikur_nubogokaliwiva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5fc88fabc1dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_6040bd1a7bdc8.pdfIn PDF document text
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/1893c6c541978eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_602dd78308e50.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/how_to_erase_iphone_4s_without_apple_id.pdfIn PDF document text
    • https://rurikuzusobow.weebly.com/uploads/1/3/4/8/134879219/vipomodoxogawokaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/99604967373.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/how_to_use_chummie_bedwetting_alarm.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_off000101df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 5468 bytes
SHA-256: 7b659bfcda102410de47b5e226a7bc2480adf8b0accc0909b96f08dfc29efa7b
font_01_sfnt_off00011463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11463 10696 bytes
SHA-256: 03262c10806ab9dba81bf1b8aeb6380f5b6a43afc80627f721974870d4516254

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