Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6e083aa0628108…

MALICIOUS

PDF

73.3 KB Created: 2021-02-17 05:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a517f23ea97c9bd7bd85585bf9b9f4cf SHA-1: 5eb499773807f8b154ffe1a5ce5a7b0c83a3de97 SHA-256: 6c6e083aa062810852a0001ef07c828d34507bb68b1d0ba4c8e934a060328b8e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=what+does+a+navy+protocol+officer+do PDF link annotation
    • https://cdn.sqhk.co/sewuvavimebi/qibgiib/border_officer_free_download_mega.pdfIn PDF document text
    • http://alisaborodaenko.design/tinijelevagisohtwbh.pdfIn PDF document text
    • https://bumekutuwa.weebly.com/uploads/1/3/1/4/131452846/3669534.pdfIn PDF document text
    • http://enots.space/53211761622uyfcf.pdfIn PDF document text
    • http://goldenframecollision.com/viduzirubopuxowuis86a.pdfIn PDF document text
    • http://wiinorama.website/the_cask_of_amontillado_full_text7gjiy.pdfIn PDF document text
    • https://cdn.sqhk.co/datujisukebe/aiGcoyZ/fairy_light_party_decoration_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/fgiRx7F/halloween_costume_ideas_for_work_party.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/ghj0Phi/church_on_the_rock_of_chaut_costa.pdfIn PDF document text
    • http://kataeta.club/rubies_of_eventidesyp79.pdfIn PDF document text
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/4090bf.pdfIn PDF document text
    • http://sunipemumax.66ghz.com/bemimewerepo.pdfIn PDF document text
    • http://grizhoff.ru/dragon_kingdom_2020lp17g.pdfIn PDF document text
    • https://lodufokokafapav.weebly.com/uploads/1/3/5/3/135346761/balojilutof.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/r98jbNA/check_my_sprint_application.pdfIn PDF document text
    • http://pokemonrivals.online/52046893476i6zwp.pdfIn PDF document text
    • http://nadahul.ru/solving_quadratic_equations_by_graphing_and_factoring_worksheetdcahm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fitatina.rf.gd/zobasetufaxoramunofegu.pdfIn PDF document text
    • http://pifutujotot.epizy.com/brentuning_vs_maperformance.pdfIn PDF document text
    • http://gikujuxi.epizy.com/vmas_shawn_mendes_camila_performance.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_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5416 bytes
SHA-256: d8ad837512ffbe35f6e0789649d01f0330e436b0275f16e17544da482d7b2535
font_01_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 10332 bytes
SHA-256: a274cf6fff982e94c4e410ab63f937112a8666d40698f5df11c83b1f6db35e16

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