Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56044b8ea9c7439…

MALICIOUS

PDF

88.2 KB Created: 2021-04-06 04:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6beb732102d648816b2c2b591d86382e SHA-1: 13ecef484b0b3e86e12280f92a72472211eb5937 SHA-256: e56044b8ea9c743906227283ae12ae358a32f49731f926908e9149df22b8d510
156 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 0.9996

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 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.
  • 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://baarspo.ru/strik?utm_term=star+trek+enterprise+season+4+episode+1 PDF link annotation
    • http://nafarami.medianewsonline.com/sovafuzuzosibema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_5fd661b49b015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470220/normal_5fce239204821.pdfIn PDF document text
    • http://vegimawubukuwon.22web.org/talurulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_6023c778c4c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_600a5f70e91fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453740/normal_5ff6c534b0244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_fffd22376cc3413ea0b525cc1acba911.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_456b9358fe8c47229001818c2636a5d2.pdf?index=trueIn PDF document text
    • http://robosawubu.epizy.com/bikibaju.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/what_are_the_rules_of_email_etiquette.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/arunachalam_movie_kuttymovies.pdfIn PDF document text
    • http://magivuxitafexox.rf.gd/what_is_the_training_for_a_navy_seal.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/como_tirar_impressora_hp_laserjet_p1102w_do_modo_offline.pdfIn PDF document text
    • http://kerexiref.onlinewebshop.net/beradoteroneluvogugoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/rhyming_dictionary_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/losakezuwesop.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_478a04deff084d41b655e3d026e33a93.pdf?index=trueIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_51c9abb4189e4c6b86650a074dadf7be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/bulipifeve.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_9bfc007538464a3db46ae28765f609c8.pdf?index=trueIn PDF document text
    • http://xadamun.epizy.com/antakshari_songs_list_a_z.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_off000119e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E9 5228 bytes
SHA-256: 749c058baaac06e4aebf057ff7f010d692839bcb061d887ac0008b29bcf6a337
font_01_sfnt_off00012bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCA 11016 bytes
SHA-256: 0ff4f548a003e47848a5eccccc1c4587145d160730b206f1dbcede0cde9889f1

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