Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb557d518116d57…

MALICIOUS

PDF

142.3 KB Created: 2021-02-01 23:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b7487248ed2b95fcc5312989f201c505 SHA-1: e41274261feeb2cb14dccbb93a9750fc7e230e1e SHA-256: ddb557d518116d5742f4dbb8f88a927f3de40a3b7053bd902554fbe4eaa8095f
126 Risk Score

Malware Insights

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

The PDF file, disguised with content about softball positions, contains numerous external URLs and is flagged by ML classifiers and ClamAV as a malicious phishing trojan. The presence of embedded URLs and the link farm heuristic indicate a strong intent to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://leonvi.ru/123?utm_term=slow+pitch+softball+outfield+positions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5fdf1c034b97f.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/hgggaPl/pocket_tanks_deluxe_download_for_pc_free.pdfIn PDF document text
    • https://satemegozujig.weebly.com/uploads/1/3/4/4/134477909/kininedawuvav.pdfIn PDF document text
    • http://hookup153.site/95292207350hfcxb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_6010ace9b32c3.pdfIn PDF document text
    • http://reform-st.ru/american_sign_language_dictionary_with_pictures_printables5fhc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453344/normal_5fe5461734d57.pdfIn PDF document text
    • http://probnik1313.tech/jirowubagimimijagurmhw5.pdfIn PDF document text
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/221909.pdfIn PDF document text
    • http://ashotik.space/61722284612v0nnt.pdfIn PDF document text
    • http://whalesqpa.fun/smash_bros_melee_iso_dolphinznrxc.pdfIn PDF document text
    • https://borikalubir.weebly.com/uploads/1/3/2/6/132681749/selojixizurus-muxudefirika.pdfIn PDF document text
    • http://obzorov.site/lexus_is250_manual0b80e.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/jarexan.pdfIn PDF document text
    • http://erkutungotu.com/75314932092dvhvi.pdfIn PDF document text
    • https://todegebonuvakef.weebly.com/uploads/1/3/1/6/131606144/pewafu.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/3141091.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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D777 3556 bytes
SHA-256: 14932d547a24e0251f41d070f736495cb0f896e2c8e2683ec2121ec377ee1cab
font_01_sfnt_off0001e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E40C 5364 bytes
SHA-256: 16cd732fa57edc93f5a56eca9d11435ea1a59c23beef4eb98021648708c5978d
font_02_sfnt_off0001f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F647 11540 bytes
SHA-256: 6f916b65cb8fd3d6efdd02c534c175afa761b9cb49f9b22137706442a3c659c1
font_03_sfnt_off00021c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C4D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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