Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93125b83d715fca…

MALICIOUS

PDF

86.6 KB Created: 2021-03-27 11:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4eb87b68b6b02565a9b1e091899ef7ac SHA-1: b5da1e6b692d9bf4cfce3a6dbe334c9e2e527264 SHA-256: e93125b83d715fca480814759a49871c60786c78109b9119421f68f8430e3294
186 Risk Score

Malware Insights

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

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 0.9951

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=17+un+sustainable+development+goals+%25282030+agenda%2529 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445573/normal_5fe1337b09437.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/is_the_5th_wave_a_true_story.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490127/normal_600a7416b3b71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5fdb89dae05c4.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/wireless_cctv_camera_types.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_6031e7d0d0546.pdfIn PDF document text
    • http://vaxenovutejuzid.sportsontheweb.net/reactions_of_alkanes_and_alkenes.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://uploads.strikinglycdn.com/files/97ee3610-e603-4db6-a399-166c07957894/kamoxesebe.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/zudidigomixebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03023942-bdb1-4ecf-9bab-35e4b07fc754/manual_de_instrucciones_radio_reloj_sony_icf-c1.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/first_alert_carbon_monoxide_detector_beeps_5_times.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/antimatter_dimensions_mod_apk.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_a148f2224fbb46348eaf18e598f00b00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d3290e-441d-43b3-9be6-883a9daea900/braun_thermoscan_7_infrared_ear_thermometer_irt_6520.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/10407482687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16bbaa8-0a15-41c1-a95e-90d550652723/13312060819.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_95d6d4f700fa4205ace531f61b1d14ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/ruxivamot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981f42e8-f130-4471-80fd-8eb8e26faa06/50035590668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779e1fde-f16f-41f0-ab44-17c302c73b42/zoxojoxevebutedewuwuvik.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_fdbf4d3f1455482d8cf4e1c61e4679e6.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_8bc4f5f5b8094002bc255f8c364b6038.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_ef4c1a1a05ca4b088612ba28539b324f.pdf?index=trueIn PDF document text
    • http://belibivizonojo.myartsonline.com/gijuxex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3216d7e5-8194-44bb-af0d-1d2fa5a672cb/56166817305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbae1479-6155-4072-853d-896bb1605572/13582323082.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_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 5896 bytes
SHA-256: 9d30d953163048a8afb061b2bf20e3983ae302807c805980f5136f256f494031
font_01_sfnt_off0001182d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182D 11076 bytes
SHA-256: 8567d59ff8d1c2b379d4f2ecf8d0a9d6a123949570dfcc9fcdb0edd4d52588f3
font_02_sfnt_off00013dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176