Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1111dd106c1bf8…

MALICIOUS

PDF

74.8 KB Created: 2021-03-31 01:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 97ec2bda79872c7a618a81bd811adfbf SHA-1: f791e16835652e4b1bd30f2323b5b92ae86a0517 SHA-256: 9c1111dd106c1bf8a66ab7ce3a3664c652467b8a3508312ff5bb2f7a13f985fb
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains references to 'how to find slope app' and 'wkhtmltopdf', suggesting a lure to a fake application or service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://zajinet.ru/strik?utm_term=how+to+find+slope+app PDF link annotation
    • http://zoxatib.iblogger.org/27416724869.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453732/normal_5ff9fc1796862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_603a5c3e97065.pdfIn PDF document text
    • http://saleproducts.pro/rowdy_baby_song_lyricsbz5ho.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_5fd9180943a56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_60076f6e38de6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_602b974f0b1b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492897/normal_605c64161141a.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://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_c40cd9a103564f26b54f90442324626e.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_97d8bcad0323443f95affd6efd9da844.pdf?index=trueIn PDF document text
    • http://wuxanewelupeluv.epizy.com/atividades_para_educao_infantil_3_anos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1a10f0-93b0-4d7d-b898-83e977135168/how_much_are_small_log_cabin_kits.pdfIn PDF document text
    • http://xaposekesudonod.epizy.com/football_game_uptodown.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_4bc7308a6fde4b4c85bbcf0e3770258d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8158142-3882-48ef-aa6e-e3923a512bd3/mevixuguxaravililubatol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a903a4-6794-4b77-a060-bac4e1a39cc0/walige.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 4780 bytes
SHA-256: a38df1038001af3d81ccda590911398f0ab3541d9ca9357db3cbc4f651ad4c6e
font_01_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10992 bytes
SHA-256: 5512bfdde82b32a6a69af6344a7c756e3b83daeb08f4f29181207ac441c14818
font_02_sfnt_off00010e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.