Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3a418b9ab8c334…

MALICIOUS

PDF

46.6 KB Created: 2020-10-15 00:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aaba158fc5a46d6fb108ad31fa5330de SHA-1: 7e937bbfe947338f474396a81248be77a54379b5 SHA-256: 7e3a418b9ab8c33417058b1438e37b22d7ef620cf37bd67191ea20e944989876
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/strik?keyword=each+worksheet+to+print+on+one+page In PDF document text
    • https://site-1041851.mozfiles.com/files/1041851/waruselejafu.pdfIn PDF document text
    • https://site-1038490.mozfiles.com/files/1038490/bokumotarodolenopijaxozif.pdfIn PDF document text
    • https://site-1039183.mozfiles.com/files/1039183/final_fantasy_7_apk_obb_mod.pdfIn PDF document text
    • https://site-1042187.mozfiles.com/files/1042187/tosizopufipizebefapubed.pdfIn PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/pezef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f870ae861a0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f876bfeef113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f87703a533c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f87350e4980c.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/65bfaa.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/7803f03.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/jetapotud.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/tikinapulusaf.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/8543923.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nidisetati.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/nemodesitunaj-xafopifoz.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9292/4821/files/winirilakewoxoviveriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1326/6344/files/cantos_para_misa_28_de_junio_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1896/3109/files/district_u_46_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7145/7430/files/sonic_runners_adventure_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0863/8632/files/nombre_complexe_exercices_et_corrig.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_off00007781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 5276 bytes
SHA-256: c7c54e188bba59aa5120dbacc59ad7c878d1f65bfb4338847b1fa915eeb926b2
font_01_sfnt_off0000898a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898A 10424 bytes
SHA-256: 09022747dcd3fe3bb2e89fc87a1f97b61a75d20384f4d1368b57593b948d56ec

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