Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab9dbbf248c6313…

MALICIOUS

PDF

74.7 KB Created: 2021-02-15 16:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8537ce2a48a1c740501d0d05267c99f7 SHA-1: 08174fcf68b5da26f22c3e8bf79e0a00e51dd227 SHA-256: 3ab9dbbf248c6313bae8418278bddfed6aad06b0f0637810b9880124568ce982
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a link farm, with the primary URL being a search query for 'samsung camera smart app'. This suggests a phishing or scam attempt to direct users to potentially malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the presence of numerous external URLs points to a phishing or redirection attack.

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 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://druttle.ru/wix?keyword=samsung+camera+smart+app PDF link annotation
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/959722.pdfIn PDF document text
    • http://agent-ritual495.online/38392164588yp5sn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_602827ae9f37e.pdfIn PDF document text
    • http://pagebake.com/sabexuvixefetazanopa5yryv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421641/normal_5fcc9eef2beb9.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/bifadiwuwileji/51824168834.pdfIn PDF document text
    • http://zakutipatijike.rf.gd/xirumudexileniwopidedo.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/46329949512.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/komitafavoke.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/assamese_gaan_free.pdfIn PDF document text
    • http://kagufunoziwezu.epizy.com/mepenitasuma.pdfIn PDF document text
    • http://niginikixino.epizy.com/vebuletezosisunalupir.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/xatopageburon.pdfIn PDF document text
    • http://gimobomir.epizy.com/simbologia_de_cade_simu.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_off0000e83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83A 5324 bytes
SHA-256: a45f57086b18eadd3078843d460d2a301646e147893b0712494abfad74cc5133
font_01_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 10776 bytes
SHA-256: 07b45967928f73b24a1b734301d80ca18d3ac6ca022bde7c1f13c1417c62b6ff

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