Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe72bea9530c1f4…

MALICIOUS

PDF

67.6 KB Created: 2021-01-17 02:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 33bcd1fe9129268e46753657babeca55 SHA-1: d2ceecb528bb55be7a6c062525adc2a2d7ec8c6b SHA-256: 2fe72bea9530c1f4ef789be5fd73ceabbd1a690a8367db5e251ad6174f7b9655
184 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The presence of numerous links, including one pointing to known malicious redirector infrastructure, suggests an attempt to lure users to harmful sites. The document body, though heavily obfuscated, contains metadata related to PDF creation and potentially embedded content, but no explicit script was extracted to detail further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://traffking.ru/aws?utm_term=shining+resonance+refrain+ps4+trophy+guide In PDF document text
    • https://weligolujevis.weebly.com/uploads/1/3/4/7/134748453/5265e5ad.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zevilaxerizixi-nored-pisuzarefa-kodeg.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/zitali.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/samokapunuz_rapine.pdfIn PDF document text
    • https://pirulavedup.weebly.com/uploads/1/3/1/3/131379447/56e11a69e5faf6.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/sopug.pdfIn PDF document text
    • https://segukikiregitep.weebly.com/uploads/1/3/1/8/131856439/ligomulopu_jokazivopowo_delufawijoduzud_gibubivufuzewo.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/Ngc2OCf/poweramp_music_player_pro_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/icCgfF9/smash_mouth_all_star_lyrics.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/friends_remix_justin_bieber_mp3_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5f9f67780cdc8.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/rexobevumalob.pdfIn PDF document text
    • https://deroguba.weebly.com/uploads/1/3/4/6/134684347/buzaxem_bodejozokatuvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5F 5676 bytes
SHA-256: cad382763924a5d2770fcdf4719865e15a36af974ab32fc8561f856b398c0cb9
font_01_sfnt_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10416 bytes
SHA-256: c88a1c30873817df4fd41ee67ecc6ee49b0302a489812c4a4aeaaf9f5a9b16b5

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