Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d214af95614b7d8…

MALICIOUS

PDF

75.4 KB Created: 2021-01-10 03:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cb754a93fe61299888796cf9d3583b00 SHA-1: 0f56a478c84714291a68bc19e106f484480830d5 SHA-256: 1d214af95614b7d849239ae26899e35b9572706d3d0c09f1be870c5530a8be50
284 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong likelihood of malicious intent, likely to lure users to phishing sites or download malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffmen.ru/aws?utm_term=file+manager+pro+apk+paid In PDF document text
    • https://zisinifaja.weebly.com/uploads/1/3/4/5/134599776/ziravawegemune.pdfIn PDF document text
    • https://cdn.sqhk.co/vozupowo/ijCg5Qo/samurai_vs_zombies_defense_2_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/bhdhhid/duty_war_ww2_download.pdfIn PDF document text
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/44843ecf.pdfIn PDF document text
    • https://kalulexo.weebly.com/uploads/1/3/4/6/134661683/3473667.pdfIn PDF document text
    • https://site-1168108.mozfiles.com/files/1168108/anime_live_wallpaper_hd_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/fPjhnl4/stickman_boost_1._0.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/To8hhqL/tunein_radio_free_download_for_windows_10.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/fulelapabo_bedosadutudek.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/9694882.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/xasovewipeje/rune_factory_4_friendship_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 5120 bytes
SHA-256: 0547ec57653a3593d5dda4ac39e099fd65bf168bd7a151bef6f8a4e1e1b5e205
font_01_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 17220 bytes
SHA-256: 0ce5b4e559df1216aa979e4f141442c9db079ee5c85201c53c5d915ab4a58cdb

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