Malicious PDF — malware analysis report

Static analysis result for SHA-256 edee78029057c1e7…

MALICIOUS

PDF

71.1 KB Created: 2021-01-10 03:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 020a54ed3d811f0bfab6060c8e2ef5a3 SHA-1: 174d7fa4eafbc6ff37cb55a3fed432da1520f240 SHA-256: edee78029057c1e70aa000708d739d13d4bfb84be1ac6a142dae7ac81ac58c03
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a heuristic firing for a malicious redirector link, indicating an attempt to direct the user to a malicious site. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=bike%20racing%202d%20mod%20apk In PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/5066078.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/hTjaiep/97601104240.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/tebowifefejezizaresa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5ff18171e2219.pdfIn PDF document text
    • https://site-1178683.mozfiles.com/files/1178683/bass_music_player_for_windows_10.pdfIn PDF document text
    • https://site-1168528.mozfiles.com/files/1168528/nautical_life_latest_mod_apk_2__122.pdfIn PDF document text
    • https://sasopezanureje.weebly.com/uploads/1/3/4/6/134691995/zakamal.pdfIn PDF document text
    • https://site-1179882.mozfiles.com/files/1179882/download_flower_zombie_war_mod_apk_revdl.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/vogubivajavofu/29413477757.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/71877281798.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/amumu_jungle_s9_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/asuhan_keperawatan_penyakit_jantung_koroner.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_off0000d894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 5428 bytes
SHA-256: 1836097bf4565daab6188bbb2de314c636f02b060a54a37da20b859217f8dc04
font_01_sfnt_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 10956 bytes
SHA-256: a7bc8d78871996fbd393cc97250153143983d75f8ff6267c983ab84e7333d138

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