Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee214e7d2352db23…

MALICIOUS

PDF

72.1 KB Created: 2021-03-29 11:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a290d18c82aea1fb8118b50e050b31e SHA-1: 108d9b5f128333d845eca8035769768d41051000 SHA-256: ee214e7d2352db23e4212ab54f4620cb9a2a68b8575ab96d970634ddd01af873
96 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 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 0.9996

Heuristics 4

  • 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://midufefew.ru/award?keyword=insuficiencia+cardiaca+aguda+y+cronica+pdf PDF link annotation
    • https://cdn.sqhk.co/sepexapubu/jdiaTVo/2018_chevy_malibu_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/gowomawabude/giWiaF0/detention_officer_salary_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/XIhdahk/sefoga.pdfIn PDF document text
    • https://cdn.sqhk.co/reditifotep/bhjjiIA/trastornos_alimenticios_ensayo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_15bbd85bb17c4a1583777043abbb2426.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/how_to_teach_simple_present_tense_to_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96bd0f6-53f2-4b67-8796-be2daee4e6da/labezonumuwoxatikuzitife.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/lagu_cakra_khan_adalah_aku.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/48920610905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc1fb65-b89f-4188-8a81-57602a072f3d/what_does_deterrent_mean_in_capital_punishment.pdfIn PDF document text
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_f3b2ee7511244ba59ea1d68dbe82d701.pdf?index=trueIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_c9eeea6a4eff4db88df485b906708ff4.pdf?index=trueIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_0bc59df73559440c8ec2253c2b7e2197.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosawef/64299399938.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/responsive_game_website_templates.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_3e6277d1479a4caa8fa8a7fff5d8a688.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e9bb51-f55c-4f5c-ba35-9175bd84f03d/silver_lunar_3_maus_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/83888893362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af56a4ef-2867-475f-a422-c19a453db6a2/mukenomukimod.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/norurezonapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4792dd7-be21-4773-ae02-e29e7056de55/jeep_cherokee_oil_reset.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 5328 bytes
SHA-256: ca14a6c405a376fb006d2b7f02f7b9bf88af5541c41bd2e797d9f7ee29602b5a
font_01_sfnt_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 11344 bytes
SHA-256: cae2eb2073796e7dc27669d457f5e29557e4368efb774c8b002e6269e2390eb6

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