Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6dc7fc119019ef…

MALICIOUS

PDF

84.7 KB Created: 2021-05-11 02:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ac8a84abafccafc3a6c85c98acf7dce8 SHA-1: f5c2b654f7f38c625100205236fdb8e14c542911 SHA-256: ae6dc7fc119019ef65e8666364b5286f1195c1528e32ffc1ee8570ce9ab64098
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms redirection to known malicious infrastructure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack, potentially involving a password-protected archive to bypass initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/strik?utm_term=ge+dryer+timer+wiring+diagram In PDF document text
    • http://ompala.store/naxijosomewefakamuvuu4tyg.pdfIn PDF document text
    • https://cdn.sqhk.co/bonidanem/kjj2Fji/world_war_rising_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/ehhggoo/kekede.pdfIn PDF document text
    • http://pumba.fun/64060242246ieylp.pdfIn PDF document text
    • http://expressvpn.store/cyberpower_cp1500pfclcd_pfc_sinewave_ups_reviewzh462.pdfIn PDF document text
    • http://raisinshq.club/zelda_majora_s_mask_guideatsf2.pdfIn PDF document text
    • http://storedubai.shop/26231233761h0xjm.pdfIn PDF document text
    • http://samyog.ru/who_does_alina_end_up_with_in_the_grisha_trilogy86bb8.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/how_to_install_mods_hoi45pt18.pdfIn PDF document text
    • http://simultaneously.space/vubalevirurekitutopaxekigy4tme.pdfIn PDF document text
    • http://p-kavkaza.ru/bose_acoustimass_10_series_11w5znj.pdfIn PDF document text
    • http://rm-swis-mine.com/tc_boyle_descent_of_manhgllt.pdfIn PDF document text
    • http://goossyy.online/wunenafiwetabenewdkljo.pdfIn PDF document text
    • http://rubeatyshop.xyz/disgaea_2_beginners_guide7elcn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_4c401a49157a4779a41714dbf09d65b6.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_ce0c0a01eb8e4eb98a5742cb543f8f37.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_abc0a07f5fa84b27b2240cabad32c360.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/guramigipuloluke.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/lagu_akselerasi_maksimum.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_b7d1c605cd094db38be5a98addc53e8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/python_string_format_integer_with_sign.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_37c6e75ca276448893b55e6e9e64e1cd.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 3136 bytes
SHA-256: 06937865d34725fd87f913930162243492e684396ecbb2d25e2c45ffaa11b536
font_01_sfnt_off00010a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A06 5160 bytes
SHA-256: 29fabd965fb004e7c500782c576b6c5b09afdf66318415180d36c4000ed98f6d
font_02_sfnt_off00011b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B96 12120 bytes
SHA-256: 81839897d79d53134a39b6e9c014bb7d7ee64b07237433b5b83c378e4ecbfbbe

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