Malicious PDF — malware analysis report

Static analysis result for SHA-256 5122648d51aaac0f…

MALICIOUS

PDF

84.1 KB Created: 2021-04-06 15:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e5b4d7eeb421f82d35da3e38661d426 SHA-1: 12004d6c52432abe2bda4b328b1dac36e82c281b SHA-256: 5122648d51aaac0f4e2fc2e555795e169398994f7454e7c7d36926c76f267c42
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal a large number of external links, suggesting a link farm or redirection mechanism designed to lead users to potentially harmful websites. The primary external URI points to 'https://botokaw.ru/wix?keyword=strike+force+hero+2+crazy+games', which is likely a lure to download further malicious content or engage in phishing. No scripts were extracted, but the PDF structure and numerous external links strongly suggest an attempt to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=strike+force+hero+2+crazy+games
    • https://zivogozupitis.weebly.com/uploads/1/3/1/4/131406352/9700551.pdf
    • https://bowulujakem.weebly.com/uploads/1/3/1/0/131069806/403d1f758bc.pdf
    • https://gagoduxo.weebly.com/uploads/1/3/1/4/131452981/6929629.pdf
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/64e93ecbd90.pdf
    • https://cdn.sqhk.co/mapiwoda/wjcihie/gezofo.pdf
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/bamope.pdf
    • https://cdn.sqhk.co/tefupudoma/cJic4jh/thronebreaker_she_troll.pdf
    • https://cdn.sqhk.co/rabuvimi/jajaREu/gmail_app_password_without_2fa.pdf
    • https://cdn.sqhk.co/godereliku/8dFAgdZ/3d_archery_shooting_tips.pdf
    • https://vaxujorukub.weebly.com/uploads/1/3/1/0/131070318/687cb5ae8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zefobik.epizy.com/bifozodupotabeno.pdf
    • https://uploads.strikinglycdn.com/files/33ad5e04-97a5-419c-81d5-f5a9fd3f0650/5th_grade_math_worksheets_addition_printable_3rd.pdf
    • https://uploads.strikinglycdn.com/files/e5ebed41-49f0-4f6b-a5cf-f3019e8b2713/5955309402.pdf
    • https://uploads.strikinglycdn.com/files/381176bb-815d-4a3c-bc2c-f22e998e8bb6/xojel.pdf
    • https://uploads.strikinglycdn.com/files/a36feaa7-c0fe-475d-b6ed-3858c630b9c4/what_does_a_blinking_green_light_on_a_smoke_alarm_mean.pdf
    • https://uploads.strikinglycdn.com/files/fba3c7a7-0c0e-4670-9474-46957840419d/88271233503.pdf
    • https://uploads.strikinglycdn.com/files/851798fd-564a-4e82-bbe4-b741829f710c/do_functions_have_derivatives.pdf
    • http://lubelulezafi.rf.gd/48922368295.pdf
    • https://uploads.strikinglycdn.com/files/73fec6cd-b481-44b1-abdf-aedc580c8ec1/vebawajozogi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108a6.bin
48fbbec5d4a317ebfce79250692cc69a017e14cc389a6e0d7d6e8002c873eead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 5716 bytes
font_01_sfnt_off00011c0a.bin
16646a22ebf7e855756aca0f0820de444f610fa9e87148be3f45228d02184b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0A 11800 bytes

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