Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d5f48e5f0a7f37…

MALICIOUS

PDF

75.2 KB Created: 2021-03-16 21:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 111cbc182f6b853e495238b67290327c SHA-1: f52c252b21256b025738f319b5aec9a210a1ecd3 SHA-256: 87d5f48e5f0a7f37765a41f84f7a324aa66e0b121487e2a02bf50911b977a61a
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=bhagavad+gita+chapter+16+meaning+in+sanskrit PDF link annotation
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/a09eb.pdfIn PDF document text
    • https://zavowajasobi.weebly.com/uploads/1/3/1/4/131406950/48f5460d4ea6031.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/febopa/android_notification_on_windows_10_without_cortana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4aff7a6-b562-4896-9c64-b1b5c81bbf4d/vobekegilenodekizifuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99d8388-0e51-4c00-bd8b-94d6e16e688a/resumen_del_cantar_de_mio_cid_por_cantos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae48f0c-113d-4ebb-920d-e84cdaab6697/condition_of_postmodernity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5aff9a-14b4-4d03-8626-5d2cf25cb9b9/how_to_secure_a_dishwasher_on_the_side.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce2f78fa-7e38-4e22-ba57-8eba4021ce36/woxexugafikedomesom.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/majamafezinawo.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/anita_blake_comics.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/90942286545.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/pasomevazijep.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/zebra_zp450_direct_thermal_label_barcode_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a5e376-3927-4481-8227-05dfea190f35/linopegejabuzuki.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/404_listening_test_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457ea128-c9c2-42a1-9354-628250ad1aa2/88303270608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb59f2f-f0a8-4cd8-b83a-8bfd0e737548/94827292951.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/bukinopekerenolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33899f16-8552-4a08-8d37-76e0ccf6a90f/resofuluva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a796aa5-8a14-4ba5-ba55-f0a2d288e1fe/86724800302.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/38591602387.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_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 5832 bytes
SHA-256: 11772bf508fe89675a2dfbffb822f96dfa9fdfa0a4a88b11079c5d6b5e8ff858
font_01_sfnt_off0000fce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE5 10088 bytes
SHA-256: 46a19e8cf5b791f9e35ca3b96a974303bcf7f6e73935916bbe5b37f62a9e5005

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