Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bfc06459285bd9…

MALICIOUS

PDF

85.4 KB Created: 2020-11-28 20:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f1f48540eaac13edd423e8cda95ad85d SHA-1: d2d2e3d3565b058fb6ebea27d2e7986e77d12673 SHA-256: 49bfc06459285bd90952ccd2a8e568381f922ed566a4dad60d20aaa151136af0
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9994

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.
  • 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/aws?utm_term=up+b.+ed+course+syllabus+2018+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f89dd0fd962a.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/peravavebulivi-vijepedebaravu-sipow-lewunaxuwavul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/exposition_in_literature_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7535faf1-cd8f-4c33-b8e1-a9d3ef09e3ce/31554766090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d958b355-2e07-4288-9d00-e758281fe271/bizim_iftlik_apk_android_oyun_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d95427a-9614-48ab-bc62-2492948c04b9/kosekaserugupebezisikutar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fbf37a-148a-4e45-a859-fc3f887938d5/jennifer_eagan_channel_7_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ba167f-3fb7-4954-9099-ccb66c8768d0/all_bass_clef_key_signatures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59abf814-de94-43b2-b4e0-7da95b7bac94/tenant_information_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f679a4-5914-4f98-aad3-3e00b1e5cb29/sevotusawuduka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf14627-180e-48d3-8ef5-87bda6cf78fd/garirosolopizome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316c5603-fbc8-445d-a2f9-636c4c6de573/gi_joe_the_rise_of_cobra_full_movie_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AD 2972 bytes
SHA-256: a54b7893a90eb529da7229f7562a5dd47fff2e342442ef4ad71424d977b65b68
font_01_sfnt_off0000db56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB56 5932 bytes
SHA-256: 4c2802f25aedcffad7d27601cf787f306065b6e8d40d3cd1cf28c31f513d3401
font_02_sfnt_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10784 bytes
SHA-256: 0001dbb21f038a94d7b23860b37cdee9c64e1285fb22de8517fa5e4c3c221d24
font_03_sfnt_off00011458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_04_sfnt_off0001295e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 9180 bytes
SHA-256: 342bc46eeb34c391cfce586b56317f3f9f360c51430f717057819baa2ba46132

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