Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a345945b64ab2f…

MALICIOUS

PDF

73.0 KB Created: 2020-10-29 00:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c1b2abf3d06df155d5564cdb2d554349 SHA-1: c9020409caa926f30563decb9ad20408ad1ca1d8 SHA-256: c7a345945b64ab2fd4347bf53894987a3895086cbc2d5430ca309153296769ee
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cctraff.ru/aws?keyword=medusa+soul+eater In PDF document text
    • https://seranogi.weebly.com/uploads/1/3/4/2/134265977/dezokufoboge.pdfIn PDF document text
    • https://donikigegetala.weebly.com/uploads/1/3/4/3/134311768/movoxibogenewu.pdfIn PDF document text
    • https://tebamebameden.weebly.com/uploads/1/3/3/9/133997375/wexaxutogidu.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/foxisewowixubetaja.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/kepederuzoto-xixawitizerew-dilalekufut-powutaf.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/6896761.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/fuporefufulipebega.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/punuserenum_nosobuvar.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/kakovasas.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000e1c3.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000e1c3.bin)
    • https://s3.amazonaws.com/gofiguj/46047178978.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/simple_machines_examples_in_everyday_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9007/6339/files/fefimetox.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/11563270804.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/najiwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/82379764336.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/building_drawing_n1_question_papers_and_memos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5464/4386/files/lg_accolade_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/durufle_veni_creator_spiritus.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/bryophytes_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8375/2128/files/lazuvovowirevaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ramukimovajated.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/rural_and_agricultural_marketing_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/nakovuxipolej.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/project_report_on_online_banking_system_in_java.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 extracted file (font_01_sfnt_off0000e1c3.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58C 3456 bytes
SHA-256: 4bcbb9143aa780a27ccaf1c98dd971ea013ced50239de491c1cd04f899094be8
font_01_sfnt_off0000e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 4824 bytes
SHA-256: 5bcb039473adaa7d7a10f0b1a80ec5ba3ad63f148110b3fc5c81a003f093d362
font_02_sfnt_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 10072 bytes
SHA-256: 7a5c7cae2d4c937abb8f690e51bfccf4dd9b7c41593f63f37ea312dce3fa0d1a