Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e7acd96899b91a…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 08:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fc1f926e57b0facb5fda14bd04195e7f SHA-1: c43f97922ba2432b30202d57d9afe1dd6cced227 SHA-256: 20e7acd96899b91a3ecfacc2c0e4297a54e7a844775b6569c4401cdf39b26084
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://zajinet.ru/123?utm_term=baseball+weight+training+program+pdf PDF link annotation
    • https://cdn.sqhk.co/fakupavod/JkCCPie/14746641235.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/bamilo_benazuzumil_zeruwo_pisulobesenibu.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/fghjcEv/catch_color_ball_switch_color_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcda5ec4942b.pdfIn PDF document text
    • http://lestyprin.online/calculating_equilibrium_constants_chem_worksheet_18-_3g4x44.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/gnokMhb/65263305607.pdfIn PDF document text
    • http://doweryklkq.space/common_themes_in_literaturerst6g.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/d5cij2g/42320114162.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/9a8eff2a.pdfIn PDF document text
    • https://samoxaposem.weebly.com/uploads/1/3/4/3/134361226/6d673ee91a6350.pdfIn PDF document text
    • http://ig-mediateam.net/40919728804w7jn7.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/ganodajisenuren-fagazela-xodetaxemulu-napabogekajib.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/xodebelemevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_600c362c92c20.pdfIn PDF document text
    • http://likelid.xyz/game_horror_pacify_androidmtqir.pdfIn PDF document text
    • http://subfamjtii.site/sotupofifijulijufiralafot2gkw.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/6096707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_604ca27c2d023.pdfIn PDF document text
    • https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/3171659.pdfIn PDF document text
    • https://najusijas.weebly.com/uploads/1/3/5/4/135400897/nuxidopute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_604fd09a88dd5.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/zibenoroduzuw/82237207026.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/balance_sheet_format_of_llp_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/browser_dengan_vpn_di_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/chicago_manual_style_website_bibliography.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/cashback_movie_dual_audio.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_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 5736 bytes
SHA-256: 6da6d30c18dfd1f639849c3bd2ec658b002ebaad95ffb3c4d8175fe1a266a7ec
font_01_sfnt_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 10804 bytes
SHA-256: 1172a38c59ccaa71e12ff68a5853c6c9a8b308b94eaf3b443f00a817e30ea6ad

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