Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39f5712416defc4…

MALICIOUS

PDF

75.8 KB Created: 2021-02-26 07:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e60b546bd0d65364ae89a43fe0a2e5d1 SHA-1: 280cc396ff290e36237ffddc753466e0904f1b22 SHA-256: f39f5712416defc4745dc33a06b3be68f99e6c32ca8dc6713c626df1cb0d573d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to insurance payments, aiming to trick users into clicking the malicious link.

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://druttle.ru/wix?keyword=peak+property+and+casualty+insurance+pay+online PDF link annotation
    • http://menajaf.iblogger.org/roxinipufu.pdfIn PDF document text
    • https://rajidorux.weebly.com/uploads/1/3/1/4/131453086/9027513.pdfIn PDF document text
    • https://derugipuze.weebly.com/uploads/1/3/0/8/130814861/c888fe5.pdfIn PDF document text
    • https://cdn.sqhk.co/guregame/ibiihje/887_tropi-_cool_roof_coating_for_rv_motorhomes.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/how_to_understand_the_bible_better_manly_p_hall.pdfIn PDF document text
    • https://tomanudiz.weebly.com/uploads/1/3/1/6/131606325/woteveja.pdfIn PDF document text
    • http://kelirajisob.66ghz.com/35277444953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/damime.pdfIn PDF document text
    • http://wemixapaw.epizy.com/best_sound_boosting_app_for_android.pdfIn PDF document text
    • http://latowetutut.epizy.com/77342021674.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/77160966181.pdfIn PDF document text
    • http://litorow.myartsonline.com/kodijufezezus.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/solaredge_commercial_inverter_data_sheet.pdfIn PDF document text
    • http://juvugevumeki.epizy.com/alpine_mrv_f300_specs.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/bible_verses_related_serenity_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/bescherelle_poche_anglais.pdfIn PDF document text
    • http://guwitus.epizy.com/witununeguvuximimeketetu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 5116 bytes
SHA-256: 177a3813a8aa6257d2c5d448ce1929566d2f99c8e8c51be0c7eae881779ba78d
font_01_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 10632 bytes
SHA-256: 91f9a9fa87ab0dad84561d6b457f5399077cc5652773ac44a3085d1d218857d1
font_02_sfnt_off000113a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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