Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a5ea01b25b124b…

MALICIOUS

PDF

76.6 KB Created: 2021-02-24 13:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 27d781ce74412224024943aeac0fa3e0 SHA-1: 514e83298c2e6df20a73ec94c41f6357f17cb185 SHA-256: 43a5ea01b25b124bd7195b7dc7648f0f5e9bd25b1ea6cbb96c9e27744041230c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URLs suggest an attempt to redirect users to malicious content or download further payloads.

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
  • 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.
  • 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://leonvi.ru/strik?utm_term=metal+gear+solid+2+sons+of+liberty+pc+iso PDF link annotation
    • http://vykupavto54.ru/vertex_form_graph_calculatorslnun.pdfIn PDF document text
    • http://weareanonymous.org/5219977311425s34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471479/normal_60322d877f459.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/39062830120j3mgv.pdfIn PDF document text
    • http://filfex.ru/kadabawujonotifixa4fbme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_6016ac8d70287.pdfIn PDF document text
    • https://walipovagotil.weebly.com/uploads/1/3/6/0/136016519/f04ad7b1b4f8cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499299/normal_5fe3029cf134d.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/6905071b0e6b.pdfIn PDF document text
    • https://barutonujumajom.weebly.com/uploads/1/3/0/7/130739232/8382801.pdfIn PDF document text
    • http://gratoramaa.website/operaciones_con_funciones_ejercicios_resueltosq7ia1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_600ee9e1a329d.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/8107679.pdfIn PDF document text
    • http://shopsupergood.site/higher_status_the_new_science_of_success_and_achievement_audiobookepfrr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wobuzisibal/65247947844.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/attestation_d_hbergement_pour_carte_grise.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/wevizalevunitokitilib.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/real_estate_agency_disclosure_form_arizona.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/leon_county_booking_report_august_31_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/bengali_movie_site_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 5492 bytes
SHA-256: 4b204bf3e0e5a5ac542444e27b6b58f39813e98823fb5b2225aa318477ff2a50
font_01_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 10032 bytes
SHA-256: e8eb6b67cf3641215f8044dbfe272e7785e7d3e669cee55e437d2c20b74f148d
font_02_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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