Malicious PDF — malware analysis report

Static analysis result for SHA-256 babb61bc1d154686…

MALICIOUS

PDF

66.8 KB Created: 2021-02-20 14:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 37a2f7f8183bad303ecee0ffb73ca443 SHA-1: 50a882ddf9cbda2067056c09125f4ae2c592cf5c SHA-256: babb61bc1d1546867f558fe49f1cd7f6a88623dd6b99fe0be29c99e1fcc44e02
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=no+school+blocked+games In PDF document text
    • http://xeeewq.xyz/soputodotewafoxewu4nyue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5fc6496d1520b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fca68b48226f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6022e7fd46464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fcd55d99a83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408704/normal_5fd1cc09345c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368246/normal_600072336ed6d.pdfIn PDF document text
    • http://naderuromopuru.22web.org/free_bhagavad_gita_in_marathi.pdfIn PDF document text
    • http://prodson.space/article_15_trailer_mp448je9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifukobokana.rf.gd/55172880650.pdfIn PDF document text
    • http://tujuluj.epizy.com/fegokugojip.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/rojavorid.pdfIn PDF document text
    • http://valamujunitun.epizy.com/75584316976.pdfIn PDF document text
    • http://sibovup.epizy.com/multiplying_and_dividing_radicals_worksheet_answer_key.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_off0000c8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C1 5432 bytes
SHA-256: fbcdfe513c9dfa029d80b8a25c82ecedca955933dd43ff92497453d767097c30
font_01_sfnt_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 10364 bytes
SHA-256: 3154489484804c97d61db42529aada8ff11567f3502b9b1d777284c3f87c45ab