Malicious PDF — malware analysis report

Static analysis result for SHA-256 1817e0ad0097c8bf…

MALICIOUS

PDF

84.2 KB Created: 2020-11-19 06:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 47aaba81636fdbb149afc54bd59a0c8c SHA-1: 16a939dc6f050034c051821166fadb6685fcc573 SHA-256: 1817e0ad0097c8bf5444ce221f15da2ce6e59e4281ca035b99c761fd644a8a6d
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors or disposable hosting link farms. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests a malicious document designed to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=my+hero+academia+two+heroes+dub+full In PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/bixaki-zozuvo-rarejipoxi.pdfIn PDF document text
    • https://fasefipuronupa.weebly.com/uploads/1/3/4/4/134471496/meteverigixel_rapulobugavuxe_sekusub_dudunigoje.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/2922499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452157/normal_5faa0e893c689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f9855d5328f1.pdfIn PDF document text
    • https://netaxodesu.weebly.com/uploads/1/3/4/3/134367037/704939.pdfIn PDF document text
    • https://rebifigu.weebly.com/uploads/1/3/4/6/134663288/7c710411b4ab5a.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/topipajebuziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_5fab02c82979d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/d825d64b-f140-46d3-8df8-58388a36029c/visualizing_human_geography_2nd_edit.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/life_road_map_worksheet.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CD 6588 bytes
SHA-256: 24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
font_01_sfnt_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 3852 bytes
SHA-256: 6b307e7d2f6082e6702ae3b8a6fea7d1cb7c00ab70d3d041564ba8c54665ecf7
font_02_sfnt_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 5600 bytes
SHA-256: 511f9b2b522f8f8ab6fde5dd8d11bb1901015ea02126b5ff12cfb767fe0e64dc
font_03_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 5672 bytes
SHA-256: dbfa5413c1a9c227ff4952054b5b0b4ac96982f99bb483e8315c477d4481d2cf
font_04_sfnt_off000105db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 12304 bytes
SHA-256: 098302344ea594acef4992d3b08890acd8625b84e73cc0cbcaf3caecdd5fef6f
font_05_sfnt_off00012d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D85 16080 bytes
SHA-256: b118ad4a5f0f66e944d0a6e82a0dad6050c27e77cb1eabf64d07f40874ae21b7