Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb10a75f84fa893f…

MALICIOUS

PDF

122.6 KB Created: 2021-05-09 09:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e48fc6d6909f4b86288aa82005ab1931 SHA-1: 29960eae550b4b3cea1b180fed62dad352116563 SHA-256: eb10a75f84fa893fec79cac8588558424ba4ed6aae3c26a0dd6d5f04d934be10
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to potentially malicious or deceptive websites. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a malicious intent. While no scripts were directly extracted, the PDF structure and link farm indicate a phishing or content-luring attack pattern.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=different+types+of+hair+textures+for+waves
    • https://nukegakisuwagaj.weebly.com/uploads/1/3/0/7/130739250/f3b30a9289b39.pdf
    • https://jawimuxuketeg.weebly.com/uploads/1/3/4/7/134763527/xurofudodabel.pdf
    • http://ijmalan.xyz/vexation_synonyms_antonymsg7hk1.pdf
    • http://arthromedshop.xyz/facebook_lite_update_version_2019914vh.pdf
    • https://tukubopanix.weebly.com/uploads/1/3/4/6/134647021/koxukufi_tosuxuwefekev_bexupewur_fibaxusina.pdf
    • http://circleshtang.xyz/blackbird_play_analysisarjff.pdf
    • http://ogranicbio.fun/vikugigusivemijefabs6yg6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_2786012dbdbf4f9298c6e135a030c199.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c34f13ab-f178-4237-a674-054f778d73be/nejiror.pdf
    • https://uploads.strikinglycdn.com/files/fc9a8170-2881-4848-9d34-79e11263be35/vabeninawexumof.pdf
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_c4af260be0454a8aa26214a764a2b118.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bb78f92b-a559-4f74-a44d-b7da1747f221/radio_shack_metal_detector_micronta_3001.pdf
    • https://uploads.strikinglycdn.com/files/4e752825-1ce2-49f4-9630-044805a0b883/fidepene.pdf
    • https://uploads.strikinglycdn.com/files/db4dba0b-e81c-463e-aea9-76de95bf66d8/how_to_stop_call_forwarding_to_my_phone.pdf
    • https://uploads.strikinglycdn.com/files/2f40bd71-83a3-4556-8d2b-f406dcbea9d4/84820198165.pdf
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_5aa8a03587604d01bd396973d037a6ef.pdf?index=true
    • http://fasojuke.rf.gd/basics_of_all_programming_languages.pdf
    • http://remavolef.epizy.com/67736360183.pdf
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_46ae52f2373146e58f60ab26d05512f4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fd9afd63-f94c-4fe9-93a0-a409ec8c6b95/66077638507.pdf
    • https://uploads.strikinglycdn.com/files/84423a25-8770-42e0-af96-d40bbd68d8c3/41599659047.pdf
    • http://mowesedapi.epizy.com/windows_10_1903_failed_to.pdf
    • https://uploads.strikinglycdn.com/files/c3fc8cd4-02ff-469b-a1bb-5118522e7a46/osi_model_7_layers_explained.pdf
    • https://uploads.strikinglycdn.com/files/70fdd462-e5e8-44cb-8f15-9092c1d3652c/60_ml_de_leche_a_gramos.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a2de.bin
9e29fd3bbb961ce6e04225fcd88029fccd0bc2604244ec5706b7368624930b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2DE 5280 bytes
font_01_sfnt_off0001b4fa.bin
83d0438f017eb3d2e476f33c1d89e0f936f05053c09c0ce0d84039f1aa062b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4FA 12164 bytes

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