Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb21b0462b4efcb7…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 11:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01ad0d0726d06e581a9e19ba0af462e8 SHA-1: ac1862f2ca8fc32a66f03bc6e81a5ba4e4452013 SHA-256: eb21b0462b4efcb7aa0bc65c67d7002d1b7452de8ed91ae5336560cc5b36a521
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=avensis+2003+manual PDF link annotation
    • http://housefashion.ru/how_to_make_a_video_with_talking_animals8qho4.pdfIn PDF document text
    • http://trylait.pro/dejisuzidi74hs.pdfIn PDF document text
    • http://eagleaff.com/79411761027siyzt.pdfIn PDF document text
    • http://jugezew.22web.org/learn_excel_download.pdfIn PDF document text
    • http://paxibokojusaduw.22web.org/qasida_burda_shareef_english.pdfIn PDF document text
    • http://ipatovaalena.ru/57231876346zysld.pdfIn PDF document text
    • http://pidawiwosoda.iblogger.org/almanak_hkbp_2019.pdfIn PDF document text
    • https://fubupudixad.weebly.com/uploads/1/3/4/7/134742266/veputo-wewatof-jaxejamejajovo.pdfIn PDF document text
    • http://natur-green.fun/225203819318dxn3.pdfIn PDF document text
    • http://smeh-mif.space/97836079824q1y9g.pdfIn PDF document text
    • http://redpandarecycling.com/82568274230sdjr6.pdfIn PDF document text
    • http://flowerport.shop/derwent_inktense_blocks_72_australiac4ndl.pdfIn PDF document text
    • http://podarokinsta.online/zegukevasawimemixunajr0t6.pdfIn PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/pipogudamisilo.pdfIn PDF document text
    • http://meetly.space/manual_da_mesa_de_som_yamaha_mg16xuzf8n3.pdfIn PDF document text
    • http://bbflowers.net/oxford_english_grammar_course_advancedav892.pdfIn PDF document text
    • http://urolog.xyz/molecule_definition_biology_quizlet8ngcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d9057ecd-6b22-4a62-b7d9-8d18875bea02/pedebarowovulotikexibomor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e322ddae-a5af-4476-82bf-933663e735c5/crane_ultrasonic_humidifier_not_misting.pdfIn PDF document text
    • http://sowabufiki.rf.gd/sinonimo_y_antonimo_de_languidez.pdfIn PDF document text
    • http://nunowezowijoper.rf.gd/93610001432.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 4912 bytes
SHA-256: 592c127553e8b6320b42e3aa39ec5bd50acf3b5497055f559cd108e24b5fea2d
font_01_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 10928 bytes
SHA-256: 2fbb4e4071361ef6fd7fb8998e6e8c0cf0a4e0494bf9076217f2f3ef1d42657b
font_02_sfnt_off000120f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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