Malicious PDF — malware analysis report

Static analysis result for SHA-256 1626263e1ac81362…

MALICIOUS

PDF

56.6 KB Created: 2020-10-29 08:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7be2f0e5a6f568092f4828ed798c60ed SHA-1: d2b6e9523f3e5a3b3b250305e46f456192ba09d9 SHA-256: 1626263e1ac8136257af532524009170b0fb07ac9ac92a2f892fb90eda8fbce7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=the+interview+1998+movie+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f9a431c9ac72.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/xipulupawuvuz-wetojarob-povom-suriwafivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f8dd03810577.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/7741836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5f991698e60f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8746c0e05a8.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/gefenu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/xuxujagifo-talimesuxuba-fugodava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f88ff0edd72a.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
    • https://s3.amazonaws.com/jeromopelurab/91346940179.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/dawiniki.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/57986199672.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/employment_termination_letter_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/english_definite_and_indefinite_articles_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/81604648650.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/nidat.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/bhagavad_gita_book_in_kannada_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/53414325097.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/85449696464.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/35488467299.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/zobokajegivonasotijikutok.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/affidavit_template_south_africa.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_off000090e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E9 4828 bytes
SHA-256: d731e173f40e73a86426d97e3e95a3342d4f9dec93141c8ea66c19f149492094
font_01_sfnt_off0000a136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA136 11108 bytes
SHA-256: a2b62e0958201865e161ddf0a5ab69b48b867397b9956be426e728cf692342a6
font_02_sfnt_off0000c6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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