Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52d08f5944b229c…

MALICIOUS

PDF

81.0 KB Created: 2021-03-05 20:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eaac1a3a9f2e939a2d532ee4d79e4b9b SHA-1: 5431174d1010155a7755263a31c87b1b016934af SHA-256: c52d08f5944b229cee3ada44ebac436612a6f49a09e2f35157d4174a81769502
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URIs, including one that redirects to a link farm on disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The document body, though heavily obfuscated, contains text related to a TV show script, likely serving as a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://midufefew.ru/strik?utm_term=westworld+season+3+episode+1+script PDF link annotation
    • http://topsalon.xyz/jeratigaxopox4xezn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5fc8e17f5a539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_603a0123547dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fe70e731950b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_60391337be32d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_6024b67fb648a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_603a478cbf4cb.pdfIn PDF document text
    • http://workbykoder.xyz/shadow_and_bone_netflix_wylan7dhcs.pdfIn PDF document text
    • http://sethel.xyz/728777852111zvlq.pdfIn PDF document text
    • http://ooovseanalizi.ru/wiwazipomonazaneb9avbj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5fcccac2e4599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_601458b707113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_602b86c349be2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448985/normal_5ff629232bff0.pdfIn PDF document text
    • http://regsen.website/100_love_telugu_movie_ringtones_free_downloadoea4o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/boxalewijim/39646037169.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/laser_cut_wedding_invitations_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/call_free_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/95672232252.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/how_to_work_jam_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/1533113269.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/seven_years_old_song_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/nezakadukuge.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_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 5176 bytes
SHA-256: 56705208e4564ca3a1b36fa2a059c02639f0bb1188142b7e423a26186ca921df
font_01_sfnt_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 10552 bytes
SHA-256: 754d5d95edc069b4e138b4310c4f6093a9f47a7011c37b977d453a043e8c4104
font_02_sfnt_off00012878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12878 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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