Malicious PDF — malware analysis report

Static analysis result for SHA-256 1849d774a8b1b088…

MALICIOUS

PDF

77.0 KB Created: 2021-05-01 04:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3d561a43a4044b8d514f76a17ed89688 SHA-1: df11a3a806e77d395b81f7ec567f20d641728939 SHA-256: 1849d774a8b1b088a3b13e48ccd4d24185310ca07bad353e0f0731884da803b6
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 0.9991

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://lozipotod.ru/strik?utm_term=jump+force+nintendo+switch+characters PDF link annotation
    • http://vosojivaru.mypressonline.com/creative_cv_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460972/normal_5ff06fb198608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_605d4edd3a283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_6063cca571bba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5ff6856b1742f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6026b3ba16bc0.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/qhjgejf/43020532306.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_6006e339a4d70.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/iThajih/pokemon_game_for_android_mobile_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jowibigodene/eHjgiaN/lejol.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/b4a5KcE/navneet_k_singh_do.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449783/normal_6052f9f7bdf59.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/adverbial_particle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464315/normal_60158f6d0f5db.pdfIn PDF document text
    • https://cdn.sqhk.co/jajejige/jehizia/ritesid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_6059ebc7dfbc1.pdfIn PDF document text
    • http://mubositesene.mypressonline.com/69859340906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_3c0f5abc1be649ad83eebd85c9492cc8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/1511601748.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/vubibogo.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_4345a465d4f0426096c6318c06f95be8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/41194645337.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/crown_jewels_worksheet.pdfIn PDF document text
    • http://bobixupeto.myartsonline.com/19960187876.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 5444 bytes
SHA-256: ddc57fc52bf8cc138063914b390276e649af8ab81241fb03224e1a186a0e01b6
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 10872 bytes
SHA-256: ec5184c67c413501e4e5933a0df75306e23060d4a6cea85d336f2824de5c333a

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