Malicious PDF — malware analysis report

Static analysis result for SHA-256 af640cd4a89c66a8…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 04:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fbae401f87276a3a7d6866e267fbfe4d SHA-1: 3c86468f9b4a355647f975c9a2d1a74c19210616 SHA-256: af640cd4a89c66a82d44cde7edb05a367ee3535f6080374ac580af6c1b7982da
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to disposable hosting or potentially malicious domains, strongly suggests a phishing or malware distribution attempt. The ML classifier also returned a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and URI findings indicate it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/award?keyword=blender+2.+8+tutorial+pdf+download PDF link annotation
    • http://garant-ritual.online/army_opord_example014li.pdfIn PDF document text
    • https://cdn.sqhk.co/pajugeluj/ZYiizij/pinesatajivazudizegewogu.pdfIn PDF document text
    • http://lefuduzitenazig.22web.org/android_studio_assets_folder_location.pdfIn PDF document text
    • http://fapseo.ru/faroxoromibigobetomivuzjasa6.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/jibIdgg/valanoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/ND6jiCs/the_triplets_of_belleville_watch_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5ffc161d30a8a.pdfIn PDF document text
    • http://sojuvofud.22web.org/70254041305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_603bcf7b81c7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_6002d217dd561.pdfIn PDF document text
    • http://golomashvanna.xyz/ancient_egyptian_queens_a_hieroglyphic_dictionaryifi07.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/ljfhVXC/is_the_warship_island_arc_good.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500201/normal_5fe1eca12894b.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://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_cf3fa359622848c3b941ffdf1603e0fc.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_2a988e8bf5dc4710924b600e3b556a1d.pdf?index=trueIn PDF document text
    • http://febarufowit.epizy.com/podofu.pdfIn PDF document text
    • http://difosotaj.epizy.com/68916106665.pdfIn PDF document text
    • http://memekafese.rf.gd/orbit_sprinkler_controller_57894_manual.pdfIn PDF document text
    • http://mafakizukizunof.epizy.com/environmental_compliance_report.pdfIn PDF document text
    • http://vamivesuger.epizy.com/fresh_pomegranate_mask_sheet.pdfIn PDF document text
    • http://donarup.rf.gd/50363064595.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_3e22578ee4fc4250a45b3409f4190a19.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_fbb625e3f9c84731a5ffbaa01e15401b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE485 5236 bytes
SHA-256: 6fea102c1580a4cd21b632b3feff976d524319e2dcfc6ecfbef0e0ad4c7dfc47
font_01_sfnt_off0000f673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 10848 bytes
SHA-256: 8ee51db4c5f5c8f53b4e00cc1023bf3434a5e059ccd1a0f13b791b904e54a8f7
font_02_sfnt_off00011b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B65 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378