Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7aa43a2ec92bfcd…

MALICIOUS

PDF

66.1 KB Created: 2020-11-28 00:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4cf58fd0b90a2b9056751e8a4f3ae2dc SHA-1: bd31b5dfafaf4de51653aa9657e663153cf18a05 SHA-256: f7aa43a2ec92bfcda8c38d58b9f61726fb2b3c00382368ea8e5cca49a1c6806f
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://traffset.ru/wb?keyword=accessibility%20definition%20pdf PDF link annotation
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/dudefireditit.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/40b808dd9b7.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/tugumeb/allergen_information_kfc.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/9531939927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010b55d3-982c-4c64-ad40-9b7f87adbf42/pabunuzawunegevifipewelu.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/health_and_safety_policy_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/simufakavimuwusilab.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/venom_movie_online_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/android_emulator_for_linux_ubuntu_16._04.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/29456996830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403a8c75-be5b-49d9-b145-053eefeb8f1e/australian_timber_oil_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39b5756-8c0c-4e04-8bea-1b2049a87f28/bandicam_free_old_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9691ab9c-d92b-4a3e-81da-3ba762082dad/19683419218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01d05ab-e506-4bc3-a375-8c68ecb11be0/makers_of_modern_strategy_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e426dd-8fec-4b47-a04c-dd8b0070fdf4/manojobudebomikadofaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd2cbd5-16a5-49ec-938f-1c4974c085d5/83582867565.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC591 5076 bytes
SHA-256: cd5e4c74af61e3556a5dbb5e9aecbe4bb8c31500f20049123ca8c1709c8ca9ca
font_01_sfnt_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 10796 bytes
SHA-256: 4b0433c5d4b1601105b26cec9e8e39072d0f21f3929e0707e7e12a08e67cab05

Open this report in the interactive analyzer, or submit your own file for analysis.