Malicious PDF — malware analysis report

Static analysis result for SHA-256 e106fa12332b80b7…

MALICIOUS

PDF

83.0 KB Created: 2021-03-09 08:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6f660fa048914efb1d113189baeacc6f SHA-1: 10641a4d7dd3fff097f9f87146c641f81ea8a529 SHA-256: e106fa12332b80b7ab67b1f7350c680d6e2ae1272ee0dadc036219734f71c67f
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/strik?utm_term=foxpro+wildfire+2+remote PDF link annotation
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/98fcfafd.pdfIn PDF document text
    • https://tajujarosoko.weebly.com/uploads/1/3/4/7/134749081/7631041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fe88f637eb17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5ff1f0d6cab13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_603e436f70def.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/desekusoxi/remington_sps_tactical_6.5_creedmoor_review.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_da959136e4234a62991f7d93cffb71d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d24b87e-cea1-4f5e-af36-2399231cb466/beats_by_dr_dre_solo_hd_cable.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_2cf90644ebaa402692c3d63be3510e67.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozilum/zepeliz.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/jdk_netbeans_6._8.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/crumple_zone_gizmo_answer_key.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_0ae8c250029d48f2981be344076c98b0.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_1f9c78e60278460494a8f1b66eab1890.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c731ae-2809-4c32-87cf-fd87f1f589bc/why_are_some_of_my_landscape_lights_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728f0b69-507b-4070-aaca-6b9ddd623bcc/cisco_catalyst_2950g_24_ei.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_cced2813d4e046f8b5c03d76ef51367c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagisi/les_articles_partitifs_grammaire.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_b6d75b33b07e4b44b86401866d761641.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_4d4681c84bad453586092fbb01387a65.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_23338b06e3ae4956acc128b81cdaa2ac.pdf?index=trueIn 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_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 5044 bytes
SHA-256: 3a58b444c4a254009036f75785141fb6fd580f2f387258ac8467b04a0fef8bbc
font_01_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 11784 bytes
SHA-256: 80a95bd308941c94ee21ac33e118311d6320600372853d7931680244c0641eb2

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