Malicious PDF — malware analysis report

Static analysis result for SHA-256 d285711f91dd53ce…

MALICIOUS

PDF

78.2 KB Created: 2021-02-27 00:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59f20eb6691da9c281b321c4098ea7f2 SHA-1: ae018ff1b79273f44203ab38755e334134ecb37b SHA-256: d285711f91dd53ced660ba385a94f51689a55c4d40d46ff9053b173cf3e0d5d2
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://seumenha.ru/strik?utm_term=sansa+mp3+player+preloaded+songs PDF link annotation
    • http://gadetebes.sportsontheweb.net/maytag_neptune_washer_and_dryer_set_price.pdfIn PDF document text
    • http://free-at.pro/63194575192o7cx4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_6037eb9c13065.pdfIn PDF document text
    • http://xigubela.22web.org/12848376228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503387/normal_6025a19ac2fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_600f983d56f25.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/wazib.pdfIn PDF document text
    • http://logorag.22web.org/wodeziwiron.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/whats_the_value_of_12.7.pdfIn PDF document text
    • http://legendbilisim.com/the_adventures_of_tintin_in_hindi_720p_downloadawfd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387412/normal_5ff67cea23e9b.pdfIn PDF document text
    • http://novedexezenel.66ghz.com/after_action_report_template_for_events.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugoxovok.epizy.com/13766733946.pdfIn PDF document text
    • http://pejebitopaw.rf.gd/givetavepemidalatasusoval.pdfIn PDF document text
    • http://melaworogafema.epizy.com/lazodajize.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/bootstrap_4_form_validation_ajax_submit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 5648 bytes
SHA-256: 6bb52f9761bd9222566b376d489da4b95914b33c14bfd9b23dbbc5d037c35359
font_01_sfnt_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 11324 bytes
SHA-256: fd8f79bd8f4c45923e4629b4973e46aa2de03b46a76c121c78731a132104d6a1
font_02_sfnt_off0001165f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74

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