Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e8efc5ef2768c9…

MALICIOUS

PDF

45.2 KB Created: 2020-10-26 06:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 296336ecf1957b977575e595d8276c6a SHA-1: db16f4f1cd8bda321ea8d150a540dae29f5a9e63 SHA-256: c7e8efc5ef2768c9d41e135230ac4bc5e27c5334aba53bb441cbfc42e8df4934
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://ttraff.ru/123?keyword=soundcloud+premium+hacked+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f8d0187f0509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_5f8e448e87991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f951549a5791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f883d93989d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8e10c98c6f7.pdfIn PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/titom.pdfIn PDF document text
    • https://zabugusu.weebly.com/uploads/1/3/4/3/134311035/voxizufapi.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/c9bf3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_5f8f439a18d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_5f8daac8cd44f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f8fa22c98fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f8e012cab6d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f877318f1040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f9087ff74225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8743326a299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8ee05bef423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8b263dd89f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dobesogum/botany_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/vegokowepefapamenadox.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/adverbs_modifying_adjectives_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/online_editor_add_page_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/aramaic_lexicon.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/arithmetic_and_geometric_sequence.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/72143468205.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/present_simple_and_present_continuous_exercises_intermediate_level.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_off00007001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7001 5300 bytes
SHA-256: d5f7b4a035951b6fddcec0692c4242d6d5237cebb67d7d0a062d2b214385bf34
font_01_sfnt_off000081d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 10872 bytes
SHA-256: 6c3f201d91a8462ba4c3cd5d72a68d5f709f61f1baa01eb34877f528c0d9a0e0

Open this report in the interactive analyzer, or submit your own file for analysis.