Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ea4195bd9766c0…

MALICIOUS

PDF

76.7 KB Created: 2021-03-25 16:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 97af11622a27ed8dab62d6c1c749f319 SHA-1: 44a73acde341b703de9c03d6f6b2161e4f80e8c8 SHA-256: 96ea4195bd9766c0d6abbf9be28fd0ccfec85c8b54e328c984e02d15fd147226
134 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The presence of external URIs and the 'SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to malicious sites, likely for downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=saxon+advanced+mathematics+solutions+manual+pdf PDF link annotation
    • http://my-credit.info/how_to_make_a_wind_turbine_in_little_alchemyfatby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_601d30a890907.pdfIn PDF document text
    • http://50offshop.pro/pawonozaru84xji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_601b6f7417cde.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/60945372996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368501/normal_5feb51396eb20.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/ecologia_impactos_ambientais.pdfIn PDF document text
    • http://igoscandinavia.com/how_many_times_can_you_take_the_arrt_examtaqi1.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/94SBshb/mad_river_drifters.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/13280015661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379961/normal_5fedc14c66e1f.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/zjeibie/bubble_letters_lowercase_r.pdfIn PDF document text
    • http://table-wait.com/ti_84_plus_ce_pokemon_red_rom4ta98.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://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_442f5620bf5a4ffbb3603d73cfd0b686.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/821ea03a-0295-4067-954f-eb8bcd31771d/irobot_roomba_655_robot_vacuum_with_docking_base.pdfIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_a4f89f67601144d4b38d234c55e106ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1469256-8ab1-4567-bc4f-73cb5c6cd743/vowulajanewavo.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_3e0e520d5a944df88f116c25195efbc6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/787b9acd-63a2-41ce-a316-fb4c6465682f/what_does_dry_mean_on_lg_portable_air_conditioner.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_cd0e71af916243f1b204921e1b28d270.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_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 5412 bytes
SHA-256: 4cd2a7ea8f943272d9152fd735e3b163e8c9f91429740890722ac5af472cb1d8
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 10808 bytes
SHA-256: 71b6bd4bd39f0700315d81cfd9c9f761ce4762b8b183d8505d81f044e8598e11
font_02_sfnt_off0001172e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71