Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddec2caaf8f48ed…

MALICIOUS

PDF

70.3 KB Created: 2021-01-05 21:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4861023d0931a7bf9a93e4472293050 SHA-1: 72b3b69eaf34c4018e0adeb89caf730bab6f0474 SHA-256: 6ddec2caaf8f48ed36c02cfde65e25b4d79e3ac3f7980025e99b2772f8ff11bb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with the primary one being a lure for a financial guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=rich+dad%2527s+guide+to+investing-robert+t.kiyosaki.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_5fb5e52da4969.pdfIn PDF document text
    • https://geserani.weebly.com/uploads/1/3/4/3/134347405/6802162.pdfIn PDF document text
    • https://cdn.sqhk.co/jufulezamuko/gijh6V7/kings_of_diamonds_london.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f998b28a1867.pdfIn PDF document text
    • https://bifezogutagu.weebly.com/uploads/1/3/4/5/134598372/373e2.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/fisulefajow/51661355121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcf29a8-6a0a-4d3a-881e-b421f922cbdc/debaxavopefofozaket.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/server_bitcoin_miner_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816903f6-b19c-410c-bf46-4a1295118920/manual_pencil_sharpener_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a107cea0-d2ea-44ce-a685-f06eb38fb951/aec_3413_uf.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/animal_rights_vs_animal_welfare_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/how_to_be_a_better_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bc9550-27e4-46ca-b830-d65579a82e97/juego_de_tronos_libro_1_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090b3b7f-abf1-48f0-85e7-cf92cb3b30ef/wavekokogoxosorun.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/95258640285.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 5856 bytes
SHA-256: 37d4dfad8d4ff519d53b1b0697ad05560da13bfc1d72a1d9895832a265962210
font_01_sfnt_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 10680 bytes
SHA-256: b811da14c367de61d83c174df4d958f19f079273c0f86c1a6cbebb003725ef21

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