Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7fa3d3c32bc84e…

MALICIOUS

PDF

72.4 KB Created: 2021-03-15 17:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0054fb11cc5b6c1d0143b3b6c5c8f0b SHA-1: 5f552ee3453e8aa54c8dfc6d7d124e883debfee8 SHA-256: bd7fa3d3c32bc84ea456acf70d502f6c972ad73e9ca0782f45f905c3a8359ac4
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=why+was+the+pail+pale+answers PDF link annotation
    • https://cdn.sqhk.co/wimedizi/fhdCrM2/95395675381.pdfIn PDF document text
    • http://kutegexuwudaro.getenjoyment.net/aerogenerador_eolico.pdfIn PDF document text
    • http://sis-paypal.com/enlace_ionico_ejemplos_resueltos37hub.pdfIn PDF document text
    • https://cdn.sqhk.co/raxizeki/ihbY0ge/anime_paint_bts_color_by_number_apk.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/7fdd3ee.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/49631689426.pdfIn PDF document text
    • http://regsenatvumen.website/15165946744taas4.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/jihghCO/one_news_now_tvnz.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/holy_quran_with_bangla_pronunciation.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/kejavimutenolotisoz.pdfIn PDF document text
    • http://bobr.space/tuloramekawvxaxl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/352c4b3b-7a84-4651-a713-4a6783ca1a79/dna_replication_diagram_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11f8557-c884-409e-99ba-90e2c1250322/42464847167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1914c45-e143-450a-95f9-44d99c78f52e/56554119210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f127e8-b30f-4556-9aec-519793058ec3/bafonap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9aac77c-b223-42c1-b24f-974b049800d2/braun_thermoscan_3_irt3030_compact_baby_thermometer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2f78ae-a388-4717-8951-7496a893c3e5/74232095559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ddeddf2-54af-44dc-bfd0-e5ad5fcaaee5/how_many_calories_are_in_taco_bell_taco_supreme.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD371 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000ddb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 5116 bytes
SHA-256: b5146bd9bfb3119762dadabda835bc1d0594c78abc9b2f57f0476795cf1ddc66
font_02_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 10328 bytes
SHA-256: a3975a320c6027909fd8cc824df5561b07f053cd5d0af4e437b66c529c7577c4

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