Malicious PDF — malware analysis report

Static analysis result for SHA-256 3432e29a1d2a8adb…

MALICIOUS

PDF

71.9 KB Created: 2020-12-17 04:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3375504dae5e7adff9818623c7866c8e SHA-1: 7431cdf9065839f2275d5cf62f1902f5d465f83c SHA-256: 3432e29a1d2a8adb472941e2b4bd685907ca206109bf37cf6ffedea57ce154d7
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm designed to drive traffic to external websites, specifically identified by the PDF_SEO_LINK_FARM rule. The document body, though heavily obfuscated, contains a reference to 'Demi-chan wa kataritai season 2', likely a lure. The primary malicious URL identified is https://trafficel.ru/123, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=demi-chan+wa+kataritai+season+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fc1672cd0d62.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/notuwa-tulajira.pdfIn PDF document text
    • https://xesupolapiban.weebly.com/uploads/1/3/4/5/134586318/b864ccf.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/c1c08b83-87de-460a-9aa9-940fe01586e3/kariluzuxowaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/travel_vlog_background_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/graphical_addition_of_vectors_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/android_google_login_apiexception_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704512b4-a980-4bf2-9685-4de45ff2216a/te_conocimos_seor_al_partir_el_pan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d799a5d-d212-4bed-ace0-f7996a91597a/anivia_mid_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/chalte_chalte_telugu_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911db509-e45a-4429-a566-98c6ad9dbc95/sigero.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_off0000dcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC8 5328 bytes
SHA-256: 139b9d3551712b9114ace29b9db43da9956dcf0a044bcc00e2bb96e259dcd000
font_01_sfnt_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 10756 bytes
SHA-256: bc3c6d357038e7f8c88d3524561d5013944219ce6341844ebd911479ade09ed5

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