Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00f9b52e3a35c58…

MALICIOUS

PDF

76.5 KB Created: 2021-03-25 17:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f331e9fb000d0dc0d1c9708f5b9c0cad SHA-1: a8f95e9c3622548c1ac2b98bc8827153c238826c SHA-256: e00f9b52e3a35c580c509f4dc2f4a30a2148f5030c35a413affde4a3f0a34cf1
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+write+a+speech+outline+about+yourself PDF link annotation
    • http://pshcomonhere.xyz/integrated_mathematics_2_volume_2_answers751my.pdfIn PDF document text
    • http://businessmentality.com/ellinika_tora_1_1_answer_key1bd5o.pdfIn PDF document text
    • http://ighelpcenter.xyz/vukoxamadonukivonivilezoz0cd9.pdfIn PDF document text
    • http://vostokzapad.su/86893954504w9snr.pdfIn PDF document text
    • http://ceter.xyz/how_to_change_load_order_skyrim_xbox_oneaw13m.pdfIn PDF document text
    • http://bestcreditcheck.info/pablo_neruda_sonnet_17_in_french84gg0.pdfIn PDF document text
    • http://cmb-accueil.com/80934505102l46fz.pdfIn PDF document text
    • http://neyroskakalka.site/930071049546qlcy.pdfIn PDF document text
    • http://muldwych.com/what_is_the_best_galarian_pokemon6g1dg.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/47980902155.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/fries_rearrangement_mechanism.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_55f9cf292b1346209a0c497471239d08.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_e40962515c0640299d60edef521f1e9a.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_5487716fdeb64a1abc9184820d691d3b.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_5043c9a147e94fa0b1c83949b9a9fbfa.pdf?index=trueIn PDF document text
    • http://jagogapibibolin.epizy.com/26617819776.pdfIn PDF document text
    • http://bataxob.rf.gd/adjectives_worksheets_for_class_5.pdfIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_9e20a63a7d864d5e94216b4243f79cf2.pdf?index=trueIn PDF document text
    • http://tikomiwewo.atwebpages.com/ecosys_fs-1135mfp_default_password.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_2bc1586bb778422fa2606d57c975c7d0.pdf?index=trueIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_9e134693591f4227918d9883356d90c1.pdf?index=trueIn PDF document text
    • http://rukosivujuxu.atwebpages.com/masupi.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_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 5396 bytes
SHA-256: 528a26bd9dece78f8a21d510c4d42106632a1bb55d9a1041e68bca765dee6c3a
font_01_sfnt_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 10536 bytes
SHA-256: 4ff3f707f8f40e8d736bc2dc098d77361e48d9569023c9e520734cbbe335e5ad

Open this report in the interactive analyzer, or submit your own file for analysis.