Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aaab7812505f72c…

MALICIOUS

PDF

101.3 KB Created: 2021-02-28 18:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 613509649ba777151e09bc84c5fb5b59 SHA-1: 137d605b6d4cdb996b97fbcbc6eb82b78efbc856 SHA-256: 2aaab7812505f72c5111cc37a784ae5ae67a2d95ee532c76e0a8681297a24e1a
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 0.9997

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://ponafet.ru/strik?utm_term=the+fox+and+the+crow+fable+summary PDF link annotation
    • http://sevagawos.getenjoyment.net/jibebikupetazakazuko.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/vghanih/enemy_strike_3_apk.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/aptoide_gta_5_mobile_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/dhdXgj5/jitipagipowixalegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_600d244121c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470960/normal_6032354d760f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_6029dd819dba6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368977/normal_5ff686089d8b4.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/xukanomarexumu/sugivozibenotometuburana.pdfIn PDF document text
    • http://dodixuvizovov.epizy.com/43481997545.pdfIn PDF document text
    • http://wolumonixor.epizy.com/anunnaki_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/80174476253.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/age_of_enlightenment_crossword_puzzle_answers.pdfIn PDF document text
    • http://lejibop.rf.gd/how_to_connect_jvc_mini_dv_camcorder_to_computer.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015d32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15D32 23252 bytes
SHA-256: 4c8330811f8a763db997412773f6d1f50f580fe332293e7d7f63be4a6b7a66c9
font_00_sfnt_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 5612 bytes
SHA-256: 5cb9a922f4dfcb0e2b2e880658d3b39e130c900f69d31eb11e3a5930c2317647
font_01_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 14452 bytes
SHA-256: fe649dcde5066b1f9b31a6ba45fb78441746455e780b261d99e5b84fe1a9df2b

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