Malicious PDF — malware analysis report

Static analysis result for SHA-256 c218d834f17bb7b8…

MALICIOUS

PDF

96.9 KB Created: 2021-03-10 15:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 614922018c2fc3d143566c3c2b40db07 SHA-1: e71866fb4f36afcfb4b9997a437c9a9b8d5029d5 SHA-256: c218d834f17bb7b89fecfb99fcad7f5379b0fd275e5b12f64d6aaecd8db52a82
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 0.9995

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://bologen.ru/123?utm_term=teoria+del+materialismo+historico+pdf PDF link annotation
    • http://chelamela.org/pumisanoveccmk1.pdfIn PDF document text
    • http://usacreditmonitoring.info/the_ampscript_guide_eliot_harper12e7o.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/trastorno_de_ansiedad_terapia_cognitivo-conductual.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/PgcQss3/74386166152.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/dcQu4Tb/tukapofurajojeturasilara.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/7cc84b8.pdfIn PDF document text
    • http://spindlndou.space/83957800364usdnq.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/Aiggfgi/ancient_civilization_history.pdfIn PDF document text
    • http://slimerecipe.org/bosch_axxis_washer_dryer_stacking_kitkxyfa.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/ijqbpig/susatotamomotokimazav.pdfIn PDF document text
    • https://ritefebeg.weebly.com/uploads/1/3/5/3/135316582/8871990.pdfIn PDF document text
    • http://malespw.xyz/daily_meme_app1e1xo.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/how_to_use_a_78_card_tarot_deck.pdfIn PDF document text
    • https://cdn.sqhk.co/fezajuwu/5hgehbS/rasikiluzunov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putesedesupelo.epizy.com/planing_cercle_de_la_forme_bastille.pdfIn PDF document text
    • http://livirava.atwebpages.com/jumitosanusov.pdfIn PDF document text
    • http://wedizakur.epizy.com/essay_planning_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ba248c-0d79-44a7-86c2-4c499f9da5e0/does_the_lexus_is300_have_a_2jz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bc9b3e-183d-4885-8cb6-f89c8fe4b878/80620047601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed96ef8a-2a94-414f-bc9e-a1db6fc2426c/8248434311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f271a16-ed6b-45a9-b85d-78b0db7c83a7/12927423331.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_off000131e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E4 2880 bytes
SHA-256: 619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
font_01_sfnt_off00013c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C22 5344 bytes
SHA-256: 6d9812c017a039703bb709ac336e7f5654ee2136c5810cbbc440d3e15b5d65e6
font_02_sfnt_off00014e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E24 11528 bytes
SHA-256: fbc0a7a77b3fca81d6bbf12ecf01a87963bcbd9ee419bec3c0a57c08848e8acf

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