Malicious PDF — malware analysis report

Static analysis result for SHA-256 a408368b2da24099…

MALICIOUS

PDF

86.5 KB Created: 2021-04-05 14:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4802b8e682b5922b31450b8bef641d7 SHA-1: 52d2b6d7bfb154ca4b6cf41c55a8f1a4ff6c48cf SHA-256: a408368b2da240992272c8498143eae48345bb25eb1b54c58bb20e083a72c218
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://dafemum.ru/award?keyword=bgp+protocol+interview+questions+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469378/normal_602fddb2b437a.pdfIn PDF document text
    • http://servempieza.site/jotun_hardtop_xp_product_data_sheetln570.pdfIn PDF document text
    • http://nicepics.xyz/66358705469qxlk0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490515/normal_606a01a05fa26.pdfIn PDF document text
    • http://krokoboko6.xyz/24553785331icuws.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_603f2c980f0f3.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/82402025369.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/688a5738fedb6a.pdfIn PDF document text
    • http://uablog.site/valamalewuvelejiwuzgl8k8.pdfIn PDF document text
    • https://vewenikeluw.weebly.com/uploads/1/3/0/7/130739128/xidekenuru.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/ce17a6.pdfIn PDF document text
    • https://dusukipujadun.weebly.com/uploads/1/3/1/4/131437174/wivukatom.pdfIn PDF document text
    • http://proita.fun/betet_2011_resultns4mz.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/dry_augusten_burroughs_download.pdfIn PDF document text
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/556718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_6034cb99b9ac5.pdfIn PDF document text
    • https://gefogujuper.weebly.com/uploads/1/3/4/0/134012332/gubixasawilobil_jojokozugavoka.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/macbeth_act_2_test_questions_and_answers.pdfIn PDF document text
    • http://yarrebitteh.online/xagedakaribilaggiw3v.pdfIn PDF document text
    • http://prizinsta24.space/skil_ras900_router_table_dimensionscbmo3.pdfIn PDF document text
    • http://dapovevi.mywebcommunity.org/husqvarna_brand_42_snow_thrower_attachment.pdfIn PDF document text
    • http://copyrightsupporteds.com/nanatsu_no_taizai_dublado_completo17ixo.pdfIn PDF document text
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/67dac34bd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadudenomo.onlinewebshop.net/present_perfect_been_gone_exercises.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_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 5652 bytes
SHA-256: 665471f391338348edb9c88c764574ed846e1d051edc6f8ccb1dc54559d68a23
font_01_sfnt_off000128e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E3 10780 bytes
SHA-256: c4a06d00d9d49437281cb5e284cf45294afe20f334d0c17e4c9b9d52ba0b0042

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