Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6417cdb0df9bad8…

MALICIOUS

PDF

84.1 KB Created: 2021-03-08 23:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 45e287ee96c9c97a0881e8ce57de7d9f SHA-1: 1ac9ad49df074ec854a53f8a68f18bf15ed6e950 SHA-256: f6417cdb0df9bad8b14ca5fb748986b5b3cf27e5c16f45126a1e9c2ebe8b724b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 5

  • 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 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.
  • 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://zajinet.ru/wix?keyword=star+ocean+the+last+hope+strategy+guide+pdf PDF link annotation
    • http://avlto.best/how_to_get_rid_of_deep_emotional_painfi6gv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fe477b311a5c.pdfIn PDF document text
    • http://operationhomeplate.com/verb_forms_list_with_gujarati_meaning_free_downloadp0yzr.pdfIn PDF document text
    • http://1xbet-registr.site/complete_php_referencecraro.pdfIn PDF document text
    • http://fullpisetc.ru/baduzofomulevazusuvetubolu8du8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_60339be1c17d9.pdfIn PDF document text
    • http://safetymirrors.xyz/inversiones_temporales_es_activo_o_pasivosk6ym.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ffa77e240b5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_b88a42f98c2f4a5d839b1be01f037a14.pdf?index=trueIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_3e4eb48c81cc46f0a1d4535a8980fd1e.pdf?index=trueIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_294314d8e6aa42188eedad6269f75a9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leributafa/beautiful_disaster_series_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/11134830841.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_a2b2c833388c445fa8695f8f62b9c615.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_170bd4092e1042d39071b3ceb95ec0d7.pdf?index=trueIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_19d874655cc44b5497ed9a7363f487b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/bemorejokib.pdfIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_b04afc57a4db494d968838d356b598a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumasun/riwugewuxunudanilurebosuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/cyberpunk_2077_do_armor_mods_stack.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/jogenanas.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/game_bomb_it_2_for_pc.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_b693017dfca5457f981ef896ae558bf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/never_back_down_motivation_song_free.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_b8f5c6d8da5e4c44b24e237df675966e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10956 5620 bytes
SHA-256: 8560707ff1dd2ff1e87925e6cc08261ae00e4d64b67f27b42912777b186041ee
font_01_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 11072 bytes
SHA-256: 8cca946aa9ca63c39a460c75b94277abb997b1010637fdc5a9d6681010b22f50

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