Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df3df2ef2007ad2…

MALICIOUS

PDF

80.9 KB Created: 2021-03-11 22:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c094363afbcf9903ae16d2ecba2e822e SHA-1: 11036c5a4c6f160ca0e68319c53ef7713cc61306 SHA-256: 3df3df2ef2007ad2e54a7442ed6f3264dda15e40eed040df03fd173a7215c78f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed as a fake invoice or payment lure. The embedded URL `https://resalured.ru/123?utm_term=birthday+cake+with+name+hd+pic` suggests a deceptive lure to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=birthday+cake+with+name+hd+pic
    • http://tareworig.mywebcommunity.org/31670540180.pdf
    • https://cdn-cms.f-static.net/uploads/4426090/normal_60445bac78bd5.pdf
    • http://goldotzyv.ru/kundli_pro_64_bit_software_free10thm.pdf
    • http://afracheat9.xyz/reditotkk7l.pdf
    • http://muzibatixabu.mypressonline.com/felidavenirokafulenipizo.pdf
    • http://nanonewe.scienceontheweb.net/naroxetowapewifigafivowu.pdf
    • https://cdn-cms.f-static.net/uploads/4420434/normal_600d7d2eb5b42.pdf
    • http://dsv-trening.ru/e_bike_kit_with_batteryc9dta.pdf
    • https://static.s123-cdn-static.com/uploads/4406466/normal_5fc743cc1ccf9.pdf
    • http://lnstagramservicecopyrights.com/53555069763x2j5m.pdf
    • https://static.s123-cdn-static.com/uploads/4501998/normal_600155f7400a1.pdf
    • http://mestorating.ru/cfc_intercessory_prayer_bookletyzsfu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/befafuni/44682554757.pdf
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_fafad513fa974736aef1ed04983bf7d6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/97b3373c-a2bd-431a-be54-ee479ce62304/how_to_evaluate_a_health_and_safety_policy.pdf
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_8fc14eda2c89463fbfad611dd66b321b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f7295f1c-f760-442c-8dc4-a3a6671b0e35/hp_elitebook_2560p_specs.pdf
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_8ca1d986ca75493683774c481d15a862.pdf?index=true
    • https://s3.amazonaws.com/zasepo/95150733204.pdf
    • https://uploads.strikinglycdn.com/files/c7318b4d-054e-4241-965d-fe16a779ec3d/how_to_properly_listen_to_music.pdf
    • https://uploads.strikinglycdn.com/files/6639f8c0-365b-428f-a32f-633c0bd0898b/guerra_de_guerrillas_su_significado.pdf
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_b10bb39472504283b990122cf084859b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8dc04217-6add-42f9-a166-ca1c31cbd9bb/napinuromosase.pdf
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_8504a840b81e47359dbf5086af18fa8b.pdf?index=true
    • https://s3.amazonaws.com/dazinibonofobi/rirabiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe52.bin
35c1fdc38c43e6a2b92db7e3b9314d306f437fc6462ef44d3af63b83b887c28a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 5412 bytes
font_01_sfnt_off000110a6.bin
0e39f7ac0454790d0b402fb4e7c73fb303716f0036f0e0cfbaa992ce6518ed23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 11108 bytes

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