Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1967663b15272a…

MALICIOUS

PDF

73.8 KB Created: 2021-01-15 10:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 650af108312dfadc8af5b07fa1e82ec0 SHA-1: 4830d36544dcdcf34e78b9b4b6c9547d46991a4c SHA-256: ce1967663b15272a18038cd5ed2a6adc5ea924bc30dc2c8c9495566dffdfa44c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'traffmen.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to book series, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=middle+school+book+series+in+order In PDF document text
    • https://cdn.sqhk.co/veleviziwew/Bmbhctb/fallout_3_game_of_the_year_guide.pdfIn PDF document text
    • https://site-1234129.mozfiles.com/files/1234129/dls_logo_persija.pdfIn PDF document text
    • https://site-1171722.mozfiles.com/files/1171722/star_wars_lightsaber_color_meaning_yellow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_5fd65652823e6.pdfIn PDF document text
    • https://site-1168150.mozfiles.com/files/1168150/virtual_piano_online_record.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/2geKgdj/farmville_2_country_escape_unlimited_keys.pdfIn PDF document text
    • https://site-1252646.mozfiles.com/files/1252646/16819602730.pdfIn PDF document text
    • https://site-1178774.mozfiles.com/files/1178774/gobibaludelomutozapuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_5fb7afe78ad5a.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/ghjgchg/path_of_war_feats.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/kozibowisenatu/87432545244.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/plural_nouns_in_english_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/17513149752.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/york_chiller_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/ala_baburao_song_dj_mahesh.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/historia_del_estado_liberal.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_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5028 bytes
SHA-256: 8b601d8547a15509cefb2d2f79eda996ac9afe4fdf49bf8f7f4f9aeffe5ded24
font_01_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 11072 bytes
SHA-256: f3754e8132abf57d6b27e2b80993108a0b1776f8eb820b441d7695765be61ee0

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