Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3371dadb177c42…

MALICIOUS

PDF

83.5 KB Created: 2021-05-15 19:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32b368cec36d3d8333c4fddcfa17ce0d SHA-1: 967eeb5d106a64b7e26213c9bc35f4344100d138 SHA-256: 4a3371dadb177c42fbe56d01487aec0de36bd73dee4617f5626e440000f37518
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://jottigo.ru/strik?utm_term=diccionario+tecnico+ingles+espa%25C3%25B1ol+para+ingenieros+online PDF link annotation
    • https://sesumevikenaful.weebly.com/uploads/1/3/5/3/135346106/duvafilanesux_disufa.pdfIn PDF document text
    • http://tranquils.space/zosukaqdgl9.pdfIn PDF document text
    • http://simenejigixera.22web.org/jaziwijewotumelime.pdfIn PDF document text
    • http://xumukekuvag.22web.org/star_trek_voyager_season_2_episode_5.pdfIn PDF document text
    • http://keviboxe.iblogger.org/kiner.pdfIn PDF document text
    • https://lomameleni.weebly.com/uploads/1/3/4/5/134597964/2969762.pdfIn PDF document text
    • http://copyright-infringement.business/futokiwizin1s1.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/safago/como_determinar_la_molaridad_de_una_solucin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ce7b74-17c6-4eba-a97b-f3fa0bf73032/denuwikutifogelatawaxureb.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/plant_and_animal_cell_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/wigowiwafofofunexulugike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4a262c-bd98-4b32-b1c7-8d82c28f1341/65128136368.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/activity_book_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6970fa79-bc5a-4edf-b694-f5f5a792b88c/descargar_musica_gratis_de_anthony_santos_mal_educado.pdfIn PDF document text
    • http://kumodifusimut.epizy.com/cadena_de_valor_de_la_empresa_gloria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e89b4f59-23f0-4e33-8e3e-5ee61eed6c98/59194500414.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/89390627461.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/mojulew.pdfIn PDF document text
    • http://rurudowofalav.rf.gd/digitech_rp80_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/architectural_acoustics.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/beyblade_battles_android_game_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 4236 bytes
SHA-256: b67db57510fed8c30249f35fafa1a6cb7d98377270074e2f5055edf4adffce90
font_01_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 5312 bytes
SHA-256: 6faf97882430d083cca1afbe27f1833074f0acf26647daa6a644588bdb3d75c6
font_02_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 15592 bytes
SHA-256: 51afd37a062dc20c91991d7be8df4e4acbaf940a4a02dd0b83f64aa60cd1442b

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