Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aeaee36f9a9f71e…

MALICIOUS

PDF

90.8 KB Created: 2021-03-10 06:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 474a0a2234fa1417054580691352ead5 SHA-1: 75b4cace4e6f59b30519cae9bb00e1f6c11e664a SHA-256: 3aeaee36f9a9f71eceab401734787dad5567df4bda5d11e9eb0047812113adc6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are dynamically generated and point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of many external links suggests the primary attack vector is directing users to malicious websites.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=theory+of+bergman+spaces+pdf
    • http://kujamemapevubu.mypressonline.com/25477962098.pdf
    • http://tejowigasinafu.getenjoyment.net/ver_pelicula_doa_barbara_con_maria_felix.pdf
    • http://tofotibuwul.sportsontheweb.net/lodaguxogugovumin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_1f3588622693400198ac9c7902541c11.pdf?index=true
    • https://s3.amazonaws.com/jidosatikim/wofafagofidejim.pdf
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_49d0491b2f5f4ec994b928dd91238c91.pdf?index=true
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d039847eae61412e8922563fabf739bd.pdf?index=true
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_370087473c904f1cb02d57d3be22da4e.pdf?index=true
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_55eb67c8dab44be1a41ce76fb006748b.pdf?index=true
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_b27c7af1f01546a69ac66594e0a792b5.pdf?index=true
    • https://s3.amazonaws.com/gekixadonuru/are_hitachi_tvs_good_quality.pdf
    • http://jabejanaboz.atwebpages.com/which_chapter_of_bhagavad_gita_is_the_best.pdf
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_fe2a7c54dab240eab573be10cf103690.pdf?index=true
    • https://s3.amazonaws.com/paxunu/zuleverexero.pdf
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_df6f522643d24cf9ab2253dd0814faa9.pdf?index=true
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_cbc0686ceb974162be7fdae67e39b772.pdf?index=true
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_cd43f72dd87a4214831d16ffa8e0d527.pdf?index=true
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_f46afe1fe5854a06a7fa35ee38968b3f.pdf?index=true
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_9a4c7d5c75fe42a3abb1f0051f0b6a34.pdf?index=true
    • http://sakogabutal.onlinewebshop.net/55846061410.pdf
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_6f50684329b44df4adcc518f7814c958.pdf?index=true
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_5a0828414293460eaa18c4f88c83eb56.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2a.bin
09b25c50cad6806b849743a2b884da8c606208f37e3fe7aa41e1fd655b5949bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 5728 bytes
font_01_sfnt_off00010f80.bin
459941a01f7ddf70c84300026babf32e93a70e5742e42962b1f87af03d3f8da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F80 17144 bytes
font_02_sfnt_off0001462b.bin
37118fc4cde3d12a667f22131ddcf2a1d5314751bfce97b7c0e91f749f3b5aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1462B 16192 bytes

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