Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe7ece54a679d1a…

MALICIOUS

PDF

73.7 KB Created: 2021-02-14 00:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 812b8243007f402e42fa1341d300656b SHA-1: 720f27528cc5e8714845563a8ab9e5be3487d194 SHA-256: 1fe7ece54a679d1a0bd1e9c396ab2621a48469c8ecda78dab04961997a3d5bde
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious and invisible links pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly support this assessment. The embedded URLs suggest an attempt to redirect users to phishing or malware hosting sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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=emphasis+by+placement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451220/normal_5fee13d504c9a.pdfIn PDF document text
    • http://eroganoficial.site/administracion_de_recursos_humanos_wayne_mondy6z0n9.pdfIn PDF document text
    • http://icub.tech/finaroxolp4sv0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fcd6c2c8b055.pdfIn PDF document text
    • http://mkuu.club/manualidades_de_navidad_con_platos_de_cartonq3ojv.pdfIn PDF document text
    • https://gitapelo.weebly.com/uploads/1/3/2/6/132682700/8004295.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/fikokivezawolago.pdfIn PDF document text
    • http://loginwithfb.site/426880221703lfji.pdfIn PDF document text
    • http://zeropium.com/simple_and_compound_sentencesjb3q5.pdfIn PDF document text
    • https://rawoxoduzipuk.weebly.com/uploads/1/3/2/3/132302868/popatuzubo.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/bovalugixutuzep.pdfIn PDF document text
    • http://slmit.fun/chhota_bheem_in_tamil_free_hdb6po5.pdfIn PDF document text
    • https://putajomarope.weebly.com/uploads/1/3/1/4/131437676/756999bc61.pdfIn PDF document text
    • http://pixelbarista.com/538299506074inti.pdfIn PDF document text
    • http://in-step.shop/javesamu7s78b.pdfIn PDF document text
    • http://menformula.xyz/hidden_valley_golf_course_scorecard80hgm.pdfIn PDF document text
    • https://fepuvagugi.weebly.com/uploads/1/3/4/7/134767339/pelud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_60208e2f43f25.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/xixonu/anniyan_movie_ambi_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/bernal_daz_del_castillo.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/good_morning_beautiful_flowers.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_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 5276 bytes
SHA-256: 76c18eff78087878121b4ac09e88a50537a42a48f27389d112e126608b96f3e3
font_01_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10372 bytes
SHA-256: b40319dd82ff8c96ab4048a80100c97c67f103097e63cbf51cfbcf0526594b08

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