Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8932d762564416b…

MALICIOUS

PDF

74.4 KB Created: 2021-02-22 10:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 54125e057b9a474c35820c2f003c8c9f SHA-1: 68b646694745e20799c72bafbdb103f5edc656cc SHA-256: a8932d762564416bdbd9943d58994f39f474979e848ffb7b9e92ab3bdb45744c
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/99d51.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=lords+mobile+hack+apk+android+1 PDF link annotation
    • http://zojesawusiniw.22web.org/barthel_index_20.pdfIn PDF document text
    • http://national-verifyteam.com/aladdin_cartoon_mp4n4lb9.pdfIn PDF document text
    • http://shoop-ff.ru/92816904942cuh7w.pdfIn PDF document text
    • http://lidzadva.xyz/77063393243sjezo.pdfIn PDF document text
    • http://cmb-accueil.com/tutitiloveritekukurpjivt.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/99d51.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/fudixoksl8sj.pdfIn PDF document text
    • http://repair-telefonov.ru/18412689479ua2xb.pdfIn PDF document text
    • http://tuxiwos.iblogger.org/gaguxikijezoxaniwitut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojobawezelo.rf.gd/liverpool_vs_ac_milan_2005_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/bulandiyan_song_video_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/journalistic_report_format.pdfIn PDF document text
    • http://jusarim.epizy.com/terraria_expert_bosses_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/banay_ga_naya_pakistan_mp4_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/15035049565.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_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5512 bytes
SHA-256: c861091ea1bc9c6792c34ba8fe9240b3acf14658bd5e261b1c1ca4631de53b35
font_01_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 10184 bytes
SHA-256: 8e468061523d7eb422e79d74cf869c8b3f28e2a67f19f394b5801dba2ad0ac76