Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06a53baaae06f94…

MALICIOUS

PDF

85.4 KB Created: 2021-03-24 10:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5cac3bc6f31d6e586f3011a7cdb2f820 SHA-1: d99662649156b3a4b55eb95b75c81c79e941d83d SHA-256: b06a53baaae06f94b00bf13d5134aefa98f032d40843faacc638a66309177f5d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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.
  • 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://bologen.ru/strik?utm_term=sansa+mp3+player+bluetooth PDF link annotation
    • http://lemakomude.sportsontheweb.net/tibokewobanabisujasogas.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/nortel_m3904_phone_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/gnjbidr/63948091153.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwonukunav/b7sgdOf/83077398242.pdfIn PDF document text
    • http://girajepom.22web.org/gekigitolesakasisixavo.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/sojupadifuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_6038e07f923d7.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ge9jdii/big_windup_fanfiction_mihashi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_5fd6fec7de8c9.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/candidiasis_vulvovaginitis_en_el_embarazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabipinipimano.epizy.com/26297573959.pdfIn PDF document text
    • https://e5acd528-9925-4355-98ed-6c6122c9c19a.filesusr.com/ugd/49fecd_9916e8aa008c453899d73df7561ab3bf.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_57910ace9bd24527b5a75926c194884b.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_bcf9948502fc45889964d98f618d141b.pdf?index=trueIn PDF document text
    • https://bee08bb6-d8c1-4cc5-89f0-d6ac88a4f64a.filesusr.com/ugd/8b8a1f_1f9599217b1346bb88cc69e15da89d69.pdf?index=trueIn PDF document text
    • http://gazunobopa.epizy.com/video_streaming_uc_browser.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_6700fdb1796c475fb546d08e5968e0e0.pdf?index=trueIn PDF document text
    • http://xenexafa.myartsonline.com/logetanidobepisiged.pdfIn PDF document text
    • http://wotituxisu.rf.gd/rukibopexodaboneme.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_d7cdb3c78a08413fad0ce4f99e52ebf5.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_off00010f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F68 5568 bytes
SHA-256: e8990bbbe424590683b7341a2155abab65030f635fd66bda890e6993262ae72e
font_01_sfnt_off00012225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12225 11176 bytes
SHA-256: 7550c6aef9c58919e884cfef15e2e264d44d84f7272b06778613c50e19b276ce

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