Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda34edb27e0ba98…

MALICIOUS

PDF

77.7 KB Created: 2021-03-07 10:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ee32c56fc993b9670f8906765fcc4636 SHA-1: 39e9dd09d85b72f72ec384546638be7409891f2b SHA-256: eda34edb27e0ba983b91ff68ca6d7491fe7cf24f6a85dbed9f438b00b6b00f05
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/strik?utm_term=english+grammar+learn+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464541/normal_602868a66b463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5fe3afaa2bfed.pdfIn PDF document text
    • http://oyuncuxx.com/boss_gt_100_anleitung_deutschsy7jw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_601b917bb16fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_5fe805572f3df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411491/normal_5ff42fe9657fb.pdfIn PDF document text
    • http://shoop-fo.ru/31471507491r9g66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_602742efc3779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ffba6a5455b5.pdfIn PDF document text
    • http://bigno.space/most_powerful_kali_mantra_mp3_downloadx7wyh.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/how_to_beat_fnaf_32p4j5.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://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_bf21e22bfb664094806d140b971f5bef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9969abf-f496-4a3f-8bdc-454f62d6a7da/how_did_absolutism_change_europe.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_e73121c7a9ea44749be405002886f6ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e373f9-039b-4106-ad37-7c73b2ff8c0a/govekizafolanunuxogikofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0563d8-3a1e-441e-9cb6-933bd7f909a0/how_to_write_a_marketing_plan_for_a_small_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a135b9-597c-4e5e-b1a2-e6879db066cc/sokobosexo.pdfIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_034caf4afab844109eaba1ee221c3959.pdf?index=trueIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_ee11c3d2cff0438ca2fe7e59fd9baf2a.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_af8b945b0c5244888f68d80e04e05d24.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_7be551eccd9b47aabee7bae66ba31701.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cc51fe-86b3-495a-b06c-47cd3ac2eca6/what_do_green_tree_frogs_eat_besides_insects.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_85ff4a7767bb4581ac3ecd9a2260e8a2.pdf?index=trueIn PDF document text
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_206aa5794121468fb6b71cb8941cea7d.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_off0000e628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE628 4764 bytes
SHA-256: 3ec28f5a380834a67cd22f03e48cea4f7f209b63d0d73214d8d84a8fe845a275
font_01_sfnt_off0000f611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 10904 bytes
SHA-256: 9e56b9b603940ebe5877255e1784c0582ad8290054bd4fe176bfe9841cb86375
font_02_sfnt_off00011b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3