Malicious PDF — malware analysis report

Static analysis result for SHA-256 1449f56d71cf7061…

MALICIOUS

PDF

66.0 KB Created: 2020-12-04 07:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 52bc731248fb766295bc0cde8572584c SHA-1: 1e79ffe6d6470c4ffe7a93be19ee81dd8d7486e9 SHA-256: 1449f56d71cf7061ab638b347fd4d605d3fc312f85a74e1f57badc9c78929806
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 0.9998

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://trafficel.ru/aws?utm_term=application+form+for+scholarship+in+usa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fbba82f123c8.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/tifidedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_5fbf25713e2b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donake/57879330088.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17973bf71053ccb1438e7/t/5fc5d9244f98375720a97aea/1606801702316/9205153233.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2af36df132613bbc92a03/t/5fc47e467acac6192a510e74/1606712902638/rhapsody_in_blue_clarinet_excerpt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71f15eddbb05c68937f14/t/5fc786c91d689b68bf9ed117/1606911689625/manipaniluxuzekofo.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/arterial_waveform_in_aortic_stenosis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dd3ec89e1c4b8fd7ff57/t/5fc556872dd96f59189f23b8/1606768264425/pentagrama_para_imprimir_clave_de_sol.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/pokemon_go_spoofer_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc193ade6d49a06bbce56ef/1606521773583/mutual_assistance_group_lancaster_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998308b9-a686-4de3-989c-204e97ff4757/waparozidimojawikagig.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/74165844769.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/bodejiwowuseririgoxaj.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_off0000c63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63B 5244 bytes
SHA-256: 64492d71a68ca7ff2e563baef969c3a279f5c6274c66efde46b77bf5c9f0ddab
font_01_sfnt_off0000d7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 10308 bytes
SHA-256: 085bf328ba37e9123e53360e6811dbc340ea58dd4e03b91631381397771de239

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