Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1178e8fbbeba5b2…

MALICIOUS

PDF

70.6 KB Created: 2021-03-05 16:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2c4e7584df5e62482e2fe0eb9726250e SHA-1: 58a976c93fafd7f8f5831e79acd3fd8e1081bc6a SHA-256: a1178e8fbbeba5b22e9b37202d2d8e5351fc29be747ff6cd3213759ea5a024eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://resalured.ru/wix?keyword=pearson+world+history+the+modern+era+textbook+pdf PDF link annotation
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/xodev_gopegik_riloxedi.pdfIn PDF document text
    • http://letgtma.bid/xutonuxvtjsr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367947/normal_5fdef1b56d5a0.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/xepigazotupik.pdfIn PDF document text
    • https://polepufexiri.weebly.com/uploads/1/3/1/3/131379743/65f49c4631b.pdfIn PDF document text
    • http://bupiwasun.iblogger.org/business_model_canvas_template_ppt_free_download.pdfIn PDF document text
    • http://zezomaxijuduj.22web.org/when_will_social_security_send_1099_for_2020.pdfIn PDF document text
    • https://fodenipijuf.weebly.com/uploads/1/3/4/6/134618914/7173292.pdfIn PDF document text
    • http://8gusevshop.website/arthrosis_deformans_kaakjous2.pdfIn PDF document text
    • http://nijibegosovatiz.iblogger.org/xobagobufurexuguzotevemo.pdfIn PDF document text
    • http://lalojit.iblogger.org/shivaji_the_boss_songs_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fec756b39dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_601ba6b78df67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_603033592d842.pdfIn PDF document text
    • http://kindraretterath.com/homophones_in_english_exercisescnquj.pdfIn PDF document text
    • https://tolawururajetam.weebly.com/uploads/1/3/4/8/134883146/puvodunefodeve_xamak_susexikazobux.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/609dd09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baluben.epizy.com/wojokakorezojuduxupeg.pdfIn PDF document text
    • http://rimalapotozuf.epizy.com/melurubefixewimalegez.pdfIn PDF document text
    • http://kowuvemanavo.rf.gd/59173332987.pdfIn PDF document text
    • http://bokapobutiz.rf.gd/laundry_symbols_guide_uk.pdfIn PDF document text
    • http://nigukeja.epizy.com/leisure_bay_spa_jets.pdfIn PDF document text
    • http://siletafelit.epizy.com/55612484149.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_off0000d220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD220 5748 bytes
SHA-256: bde43f5d71be20a4602ceca917e17e086df9e5622f06cb029048852c1100d9cc
font_01_sfnt_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 10944 bytes
SHA-256: 94405dc44688834e2bda4b3cdc5d91cd0863f315935d2542290ce0c91f762914

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