Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa699e06553365e2…

MALICIOUS

PDF

89.8 KB Created: 2021-05-13 23:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 774d7412ff55264c4b782defb49c8181 SHA-1: 30ee4e8ed295b39d0902b47f608c22a89c61b227 SHA-256: aa699e06553365e228d86c32468d2ff1cdade393fc9ec24588a663017b266645
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9989

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=excelsior+springs+missouri+obituaries PDF link annotation
    • http://sifuzifixezija.medianewsonline.com/libro_abraham_lincoln.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5fdecdde2d6cc.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/57567768075.pdfIn PDF document text
    • https://ramowofotaro.weebly.com/uploads/1/3/1/6/131607053/4a2648d.pdfIn PDF document text
    • https://votujejigep.weebly.com/uploads/1/3/1/3/131380583/199fdd.pdfIn PDF document text
    • http://bifozitixexidad.mygamesonline.org/vuguduxuxaz.pdfIn PDF document text
    • https://tabivivefevevu.weebly.com/uploads/1/3/4/8/134889686/figixefudoni.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/baxojulos_wixuduxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_6066b7e66e017.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://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_aeee12697b1142e0a9cb494e4462e35a.pdf?index=trueIn PDF document text
    • http://japamitafixe.myartsonline.com/gre_word_list_magoosh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91bdb48-c041-4f27-8a08-ae4ce4a68ef5/fofipubavonasiwofof.pdfIn PDF document text
    • http://zovuzizosagedip.epizy.com/34862516978.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_14c392ac8a9d40c381937bcb6a7ff0b1.pdf?index=trueIn PDF document text
    • http://gaxufaxurawago.epizy.com/35482873472.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_22e76ecf0b664767950f49e1241d62a2.pdf?index=trueIn PDF document text
    • http://fopekexu.epizy.com/91576445582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86f7430-9fd3-4789-b7e2-df6c1b4ca8ea/how_many_epic_certifications_are_there.pdfIn PDF document text
    • http://wegadikas.epizy.com/18214193396.pdfIn PDF document text
    • http://josejutolaxof.rf.gd/90948176143.pdfIn PDF document text
    • http://fuzolegogi.atwebpages.com/riviguvawozifenaxaxafe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 5300 bytes
SHA-256: 2b86eb4e971f40eec3da41bc95eaa85db2f3708599c1e13ccca4af5f8fc4462a
font_01_sfnt_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 2524 bytes
SHA-256: 99bb4e325829a6b38c4ca78b93f2a548fa6c8abbfcb6554e8dda9025a84593d0
font_02_sfnt_off00010e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E81 10820 bytes
SHA-256: f9c8027b323dd643b683848777ebdd70c739621daec689854f9eaf835c771cfd
font_03_sfnt_off00013395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13395 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_04_sfnt_off0001489c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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