Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c1b93d5cc45243…

MALICIOUS

PDF

87.0 KB Created: 2021-03-13 15:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a25ed52c80ea61f75cfde7206258ce04 SHA-1: bca99c43019a56e32c795fc5ef7df40265851832 SHA-256: d3c1b93d5cc4524311133be2a3365e287814b7f28d6931a05ea6415fe34c164e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm hosted on disposable domains. The primary malicious URL, 'https://maypoin.ru/wix?keyword=beauty+and+the+beast+auditions+2020', suggests a lure related to the search query. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/wix?keyword=beauty+and+the+beast+auditions+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403271/normal_60426e860ddc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_6024137f30eeb.pdfIn PDF document text
    • http://pojitutujux.22web.org/burifasanotejav.pdfIn PDF document text
    • http://mosquito.codes/rokiludolukeseloe5h.pdfIn PDF document text
    • http://trellos.fun/hand_of_fate_2_guide3z6wt.pdfIn PDF document text
    • http://gufutaca3.xyz/the_basketball_diaries_book_excerptsjn4yv.pdfIn PDF document text
    • http://100p-f.ru/kunuwifemutinunegujudem1lu9b.pdfIn PDF document text
    • http://tgesheff.xyz/23791773474832.pdfIn PDF document text
    • http://tohld.in/39862348553ela2r.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/dVFePP3/41833929567.pdfIn PDF document text
    • http://vujivozopix.iblogger.org/44961347653.pdfIn PDF document text
    • http://sadovik.me/vujuzatadumamiwuwjdiy3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_6038fea25203d.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/jasjeja/gimepirovix.pdfIn PDF document text
    • http://silvanozito.online/54841241405ybfk6.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
    • http://tituroxir.rf.gd/hidemyass_vpn_free_trial.pdfIn PDF document text
    • http://tafikepuvanotu.epizy.com/blackmart_alpha_apk_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb1699f-e159-47c8-9d72-6e60d6d10173/way_of_the_superior_man_audiobook_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3257d85e-ca9d-4e09-89e2-fe5a76e2ac93/ppt_figurative_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8278704b-183b-4c4e-a1c4-ac5b38a34bad/lukajizinapibizidufogo.pdfIn PDF document text
    • http://suvejosojop.epizy.com/word_labels_template_16_per_sheet.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_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 5232 bytes
SHA-256: 839989cd54021ad8cb23c85600249cc8f203782b1bc991b18188286c148d3599
font_01_sfnt_off00011936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11936 11452 bytes
SHA-256: 48be3329e48c1b97ce7ac6beeaff290fcf640f7cfe829f32a5dac60be648a166
font_02_sfnt_off0001400c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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