Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5134cdeea553a7…

MALICIOUS

PDF

82.2 KB Created: 2021-03-10 09:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 993a259b72419b10076bf6b0937c853d SHA-1: 164214abef5c503484117840a5da19e895ee6a56 SHA-256: 8d5134cdeea553a75c34a471ac0d9e6798ac76e3b3c78d0cf3f5939e5c7157ce
156 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 0.9991

Heuristics 5

  • 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.
  • 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://ponafet.ru/aws?utm_term=can+i+add+uconnect+to+my+ram PDF link annotation
    • http://ooovseanalizi.ru/kenmore_dishwasher_665_manualswejt.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/4612755.pdfIn PDF document text
    • http://white-x.fun/galejudumedavofitj8ziv.pdfIn PDF document text
    • https://golisoni.weebly.com/uploads/1/3/1/4/131437826/eebc6f.pdfIn PDF document text
    • http://betmoy54.com/jigakuxuxiwolalxsb2f.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/nozatif.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/guguzikenunomuzib.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/nosineliloterexurenatafu.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/mupesenaguxafa.pdfIn PDF document text
    • http://complect-tech.ru/wuzutunexemufoxogu00f5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/salamon_tanker_bulker_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/hp_elitedesk_705_g3_dm_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/bharat_movie_all_songs_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/4liker_old_version_apkpure.pdfIn PDF document text
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_9caa781d362847c6806577b47bb43e83.pdf?index=trueIn PDF document text
    • http://refusunono.onlinewebshop.net/grade_5_math_practice_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/sda_church_manual_revised_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/nutritional_information_cashews_vs_peanuts.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_24f0d61fda5c42bd887447d97aa7f6c2.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_b0a6a3bdccb5497fa81460b0ddbaab28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/lolefoj.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/xapezupasuvalixa.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_dd849359bf554fcbaef62917ae42fdb2.pdf?index=trueIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_076aec1f8e614d53b69b9acad86c070b.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_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 4880 bytes
SHA-256: 67f2efaeac3193f4ce542c1abb12828f8e0de6ddc1f609ea4e69a6ac3c7e92e4
font_01_sfnt_off00011620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11620 10900 bytes
SHA-256: 1d761ae28378e0571e38244ec91d098b797c3cb8b449f6b486193c43e878a393

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