Malicious PDF — malware analysis report

Static analysis result for SHA-256 814b7ec7152766a8…

MALICIOUS

PDF

97.8 KB Created: 2021-03-15 22:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04b97dcfe5202bcf178e087706bbccd4 SHA-1: e9019464aa01ef862522e6cdbbb98ef10c81548a SHA-256: 814b7ec7152766a816d33d2739908f2783f65b1cd852c00c96cd4e84d8fa3d70
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains a large number of external links, forming a link farm, with the primary URL being https://resalured.ru/wix?keyword=getting+blessing+from+sage+pokemon+heartgold. This suggests the document's purpose is to redirect users to potentially harmful websites, likely for malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=getting+blessing+from+sage+pokemon+heartgold
    • https://cdn.sqhk.co/pivokazi/s7ihehb/9510097191.pdf
    • http://obuv-kozha.ru/62105241405x9erf.pdf
    • http://mynasert.online/86331449488e6k8m.pdf
    • https://cdn-cms.f-static.net/uploads/4476429/normal_6027884264d9d.pdf
    • https://cdn-cms.f-static.net/uploads/4377115/normal_601877469e32e.pdf
    • https://cdn-cms.f-static.net/uploads/4389104/normal_603171abe955b.pdf
    • https://cdn.sqhk.co/metexemoraga/SticXjd/missing_411_books_used.pdf
    • https://cdn-cms.f-static.net/uploads/4480588/normal_604d41362cf9b.pdf
    • https://cdn.sqhk.co/zirixegip/gOjjmBE/twist_hit_apk_mod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b4d3f562-936e-40fe-97ff-76865778e510/does_gimp_work_on_ipad_pro.pdf
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_d1ce4760174645dd8c6d9ae27a87ba33.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bd60d023-5b4d-45bf-aca8-09a6c06ebf40/46737543137.pdf
    • https://uploads.strikinglycdn.com/files/d27689eb-5a96-4f49-ad1d-b2bb6e8b4f2f/50513397564.pdf
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_c54ebb30c2ee468b848afaffce6229de.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f7b59430-7d14-439d-8aea-4b7cf17fd3b5/pasuworukoke.pdf
    • https://uploads.strikinglycdn.com/files/20d62c84-7109-490b-b81e-3bc0c76e8204/ice_cream_makers_recommended.pdf
    • https://uploads.strikinglycdn.com/files/c0d7a31a-68d7-4c50-a1d2-69d7bbeee86d/how_to_adjust_hoyt_draw_weight.pdf
    • https://uploads.strikinglycdn.com/files/b0177594-bfd0-4ba0-b56a-ed882a35f41d/96833887088.pdf
    • https://uploads.strikinglycdn.com/files/bda1ece8-6a5f-426f-9fa7-010819f4a24d/my_dungeon_shook.pdf
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_fdec23f4575841adbddb51065d4305c8.pdf?index=true
    • https://ee809a51-a58d-41df-a269-13688c4e1c69.filesusr.com/ugd/5f587b_6f1784cc75eb4cf5b390b94a945c703e.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011563.bin
e9d643e0f813176a35785f48355bea0d24d2940d8c7d33fd286b1876938384f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11563 12172 bytes
font_01_sfnt_off00013d3c.bin
ba6e5eae067115fca50da21ddcce20199b956c93fdd00433b4ddf295ae41298b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3C 5692 bytes
font_02_sfnt_off0001506c.bin
a8916a92bc7681046fe20b3a0fd611619423981c35cb0c12d62642d018b3834a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1506C 11428 bytes

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