Malicious PDF — malware analysis report

Static analysis result for SHA-256 e217fe5b1caeff60…

MALICIOUS

PDF

75.2 KB Created: 2021-04-07 20:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 13b77f5233cfd8ad0c9787a25982908e SHA-1: b0f22a232156f26668624a7c51dfb1dab745f9c6 SHA-256: e217fe5b1caeff6005bf50f4eb3660e3d47b61116caf2e9b090a500ee789957b
186 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 as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://gimoguvi.ru/aws?utm_term=world+war+z+novel+ending PDF link annotation
    • https://migijulomav.weebly.com/uploads/1/3/5/3/135394851/dinisijewat-divuv-fodurir-sidowu.pdfIn PDF document text
    • http://delinapod.mypressonline.com/44475982675.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/gcHgjie/761362276.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/psychological_testing_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_603de466add93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_6057079ce40a6.pdfIn PDF document text
    • https://megimopitujoni.weebly.com/uploads/1/3/4/6/134681749/bajorawo_ranipururedov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_6054848e51778.pdfIn PDF document text
    • https://sepikiduluwad.weebly.com/uploads/1/3/4/4/134487701/vetinepe_fogodalolusutoj_fawiked_begalowevura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446507/normal_5fee6f42b1d5c.pdfIn PDF document text
    • https://seboneluwisog.weebly.com/uploads/1/3/4/3/134368334/9915820.pdfIn PDF document text
    • https://vutepunuvo.weebly.com/uploads/1/3/1/6/131637517/labuvepujaxedopira.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/widebunixuxosegoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/i8jeZge/ludakekojifuvegafapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479916/normal_5fc5a36ea8dfd.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/iZdewf1/hexion_inc_geismar_la.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/3d2380ff1060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najukelosuned.myartsonline.com/food_chain_in_aquatic_ecosystem.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_899d575083b34938b6c7b819308627e4.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_3a8c1a967c3841de8fff8f544bf112e1.pdf?index=trueIn PDF document text
    • http://domuromu.atwebpages.com/84558657692.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_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 5032 bytes
SHA-256: 65bb7c612c870aff15233886d9eb52a763f19d112bf3b87f218ef8679bf5e877
font_01_sfnt_off0000fba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA8 10148 bytes
SHA-256: 440e5c7e2acdb93d2f54796b58589a6f244a8be7dccd506a930017d5df731cc0

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