Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30b7600749329cd…

MALICIOUS

PDF

71.8 KB Created: 2021-02-16 08:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 292772934ded39b9b4d212f3e676acfa SHA-1: 7ad1c17e7b14b4fbb696a796318131d0453aa2e8 SHA-256: e30b7600749329cdac8e894b487b7ff7e93ec35674634037da31c9a38cb7e872
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to game hacking tools, suggesting a lure for users seeking such software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=sb+game+hacker+no+root+mod+apk In PDF document text
    • http://nobirejajatit.iblogger.org/76742376123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fde2272bc549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6022ce2d5581e.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/SbTcKgc/sniper_strike_blood_killer_mod_apk_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477137/normal_5fed58db95996.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/Dghhehf/jibawilomerugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fe3ee0493fab.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/hhgiihn/pezujikefe.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/ijjfQau/91344797889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380522/normal_5ff71199af353.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/zidosozawok/business_email_introducing_yourself_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/canadavisa_forum_express_entry_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/83166408662.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/lilogibomavoj.pdfIn PDF document text
    • http://totaraxidob.rf.gd/android_reviewing_current_content.pdfIn PDF document text
    • http://vemameb.epizy.com/zetijiximofetumo.pdfIn PDF document text
    • http://sosisime.rf.gd/zakawajemokukumip.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_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 5584 bytes
SHA-256: f54ad4ef4fca7faa16bb0a0a19336bb0271704a48e310881ab724189b5bc7d63
font_01_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 10528 bytes
SHA-256: 7b13d054128fd8177cf8966d425bd4e8320205b3d95cf9e7550405dea920cf5b

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