Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2c65f1720639cd…

MALICIOUS

PDF

129.7 KB Created: 2021-03-17 08:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edd36cdf8224580bc73b8b7a810281d7 SHA-1: e17590b8659899fdecefda110f09f25d5a11cc84 SHA-256: 1d2c65f1720639cd03db8d1955df8d51342afbb0ca4510b9a6f738e7acea91ca
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be a lure for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=what+does+dabble+mean+vocabulary
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/f28bddc4db09836.pdf
    • https://rarinuda.weebly.com/uploads/1/3/5/3/135349313/rukovenaluk.pdf
    • https://radewisuvux.weebly.com/uploads/1/3/4/6/134689192/6154376.pdf
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/6508107.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/vuraradaso/hours_worked_excel_template.pdf
    • https://2ad55d82-15d9-4995-b72c-f03dca93b5f4.filesusr.com/ugd/11b7eb_1335270460f446a8a3503d676e83a9f5.pdf?index=true
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_803214324e57488fb0c322d98caa4e03.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e0d89e23-ea63-49c4-b4f8-c90c67528de8/the_uses_of_enchantment_review.pdf
    • https://e41bb7a9-a35b-4578-ac27-1eab720d379a.filesusr.com/ugd/8912ce_a8310e8d1f6e46dc8804d307087d5225.pdf?index=true
    • https://s3.amazonaws.com/wefemabeni/zipetapotilajadezotadiwu.pdf
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_f355a67428ed45c4b09c69c49df1e7ec.pdf?index=true
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_87e80d11e27e482dbadf8b72a56c3dd3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2cae44e2-1945-4b5f-8e73-5ac4f62a0dbd/dopijijokajam.pdf
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_c36fc576270f4b12badc1e14f8a38c5b.pdf?index=true
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_4872126d85b74d028beb5d2e586ba820.pdf?index=true
    • https://uploads.strikinglycdn.com/files/137ad8db-a810-4a8b-ac57-f1265d410068/americas_book_of_secrets_season_2_episodes.pdf
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_a61a7f7d35344d46a80be548ecd0d69f.pdf?index=true
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_971386577eaa4fc3a85ec5e29518ae74.pdf?index=true
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_4734fc93b3494181b2d2890e0d26cc89.pdf?index=true
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_8e842f759d0e4887ac320669bf88aed6.pdf?index=true
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_e0afc12e2bf84ccca1fcc1155a324827.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001b7c3.bin
1ada6e35eaaf0ce96b29f427c04b754f6e72a1dab283b608b1b63626f67429c6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B7C3 26460 bytes
font_00_sfnt_off000119bc.bin
9857e93733a8ec1a94341e38502e344fd11f913afcca16280ecdd7a6cfac6742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 15672 bytes
font_01_sfnt_off00014cbc.bin
3a20601d732115a230699e873f0ed17b381090b0ef28e87c8e4502014824b55b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBC 5492 bytes
font_02_sfnt_off00015f48.bin
de4f290f958b7e93d21e806e2f73fe56d8d0764043833af8a264e6f2b1c1e023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F48 7964 bytes
font_03_sfnt_off00017568.bin
58077f94d7a33a2b3ea2e2adcdf4ce15575dc3173c9ab3d56627552fae8d1f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17568 24236 bytes
font_05_sfnt_off0001e5eb.bin
2a71fb47de7666cee998a8c3e81b5c85cb4b63561cec36e45f63c54f76962f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5EB 4112 bytes

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